iOS 25/26: What Is It? The Background of the Name Change and an Overview of the Update

Most people searching for "iOS 25" want a rough idea of what will follow the current OS and how their device will change. This chapter organizes the flow from iOS 18 onwards and explains in more detail why "iOS 25" is effectively "iOS 26."

Apple has announced a policy to standardize the numbering of its major operating systems—iOS, iPadOS, macOS, watchOS, tvOS, and visionOS—to "26." This makes it easier for users to associate "2026's OS = 26." This standardization is also expected to benefit organizations and educational institutions managing numerous devices, simplifying OS version tracking.

On the other hand, when names change significantly, search keywords can temporarily cause confusion. It's natural for a certain number of people to search for "iOS 25," and for information providers, it's crucial to carefully explain both the "name difference" and the "content update" together.

👉iOS 26: Update Now or Wait? A Complete Guide to Decision-Making, Preparation, and Troubleshooting

The Jump from Sequential Numbering to "26" and the Calendar Year Approach

Previously, iOS progressed with simple sequential numbering: iOS 14, 15, 16, 17, 18... However, this method made it difficult to intuitively understand which model year the current OS belonged to. So, Apple shifted to aligning the OS number with the year it is primarily used, similar to car model years. For example, the OS released in the autumn of 2025 would be numbered "26," anticipating it will be the primary OS used in 2026.

Due to this change, numbers like iOS 19-25 will become "non-existent generations," but users only need to understand that "iOS 26 follows iOS 18." Similarly, iPadOS 26, macOS 26, watchOS 26, tvOS 26, and other Apple products will all align to the "26th generation."

What's New in iOS 26? Design Refresh and Enhanced AI are Key Pillars

iOS 26 is an update that brings significant changes in both appearance and functionality. Visually, a new design language called "Liquid Glass" will be introduced, using glass-like transparency and light reflection in elements such as the lock screen, Notification Center, and Control Center. This design aligns with the visual expression adopted in Apple's AR headsets, aiming to enhance consistency across the entire ecosystem.

In terms of functionality, the "Apple Intelligence" suite of AI features will become available in a wider range of apps and scenarios. The focus is on features that simplify daily smartphone operations, such as summarizing and rewriting texts, generating images, translating, and automatically organizing notifications. While compatible devices are limited, devices equipped with A18, A19, or M-series chips will see significant benefits.

Key New Features of iOS 26 and Their Benefits in Daily Life

For users, the main question regarding iOS 25 (effectively iOS 26) is "what new features will be added and how will they make daily life more convenient?" This chapter organizes the new features from the following three perspectives:

1. Visual and operational updates (Liquid Glass design, etc.)

2. Enhanced AI features with Apple Intelligence

3. Evolution of frequently used standard apps like Messages and Safari

While some people might feel that updates only bring niche features irrelevant to them, iOS 26 includes many improvements to areas everyone uses daily, such as "notification organization," "daily messaging," and "web browsing," making it highly practical.

Liquid Glass Design and Changes to Notifications and Control Center

The symbolic change in iOS 26 is the Liquid Glass design. Notification cards on the lock screen and Control Center panels will shift to a translucent "through-glass" UI, subtly changing their appearance based on lighting and background colors. This will significantly alter the look of notification lists and quick settings, with some feedback indicating "initial unfamiliarity, but a sense of integration and comfort once accustomed."

The benefits of this design change are not merely aesthetic. For example, it offers practical advantages such as:

• Visibility varies by notification type, making important ones easier to spot.

• Control Center tiles are reorganized for quicker access to frequently used actions.

• The entire UI maintains a consistent look when switching between dark and light modes.

Of course, some people prefer the previous simpler look, but when choosing a used or older iPhone, whether it supports this new UI is an important factor to consider for long-term use.

What Apple Intelligence and Other AI Features Can Do

In iOS 26, the Apple Intelligence initiative, which began with iOS 18, will be more broadly and deeply integrated. Apple Intelligence is a suite of AI features built into Apple's native apps, primarily enabling the following:

• Automatically summarize notifications, emails, and messages, allowing for a quick review of key information.

• Rewrite long emails or notes by summarizing, changing tone, or converting to bullet points.

• Generate simple illustrations or icons and insert them into messages or notes.

• Translation features integrated into Messages, FaceTime, and Phone apps for easier international communication.

These features are designed to be fully utilized on devices with relatively new processors, such as A17 Pro or later chips, or M-series chips. Therefore, the generation of iPhone you should choose will depend on whether you want to heavily use AI features. Since AI is a "convenient to have" level, suitable models will differ for those who "prioritize cost performance and want to use it cheaply" and those who "actively embrace new experiences."

Evolution of Classic Apps like Messages and Safari

In iOS 26, beyond aesthetics and AI, there are numerous subtle improvements to standard apps used daily. For example, the Messages app will gain features to enhance communication, such as group chat polling and background customization. Safari will see updates to improve daily web browsing, including tab group organization, article summarization, and protections against ads and tracking.

Even used or older iPhones, if they support iOS 26, will fully benefit from these improvements. For those who "don't need the performance of the latest Pro model but want to ensure daily comfort," OS-level advancements are very important. When choosing a device, pay attention to whether it will receive updates for the next few years.

iOS 26 Compatible Models and Estimated Lifespan

Next, a common concern is, "Is my iPhone compatible with iOS 26?" and "What's the safe range when buying used?" Here, we'll summarize the compatible models for iOS 26 and an estimated support period, based on Apple's announcements and major media information.

Broadly speaking, iOS 26 will support iPhone 11 and later, and the second generation iPhone SE and later, while 2018 models such as iPhone XR, XS, and XS Max will no longer be supported. This is because as Apple integrates more demanding features like AI and new UI expressions into the OS, it becomes difficult to provide a comfortable experience on older chips and with less memory.

List of iPhones Compatible with iOS 26 and "Out" Models

The representative compatible models are as follows (information as of 2025):

• iPhone 11 / 11 Pro / 11 Pro Max

• iPhone 12 / 12 mini / 12 Pro / 12 Pro Max

• iPhone 13 / 13 mini / 13 Pro / 13 Pro Max

• iPhone 14 / 14 Plus / 14 Pro / 14 Pro Max

• iPhone 15 / 15 Plus / 15 Pro / 15 Pro Max

• iPhone 16 series (16 / 16 Plus / 16 Pro / 16 Pro Max / 16e, etc.)

• iPhone 17 series (17 / 17 Pro / 17 Pro Max / iPhone Air, etc.)

• iPhone SE (2nd generation / 3rd generation)

On the other hand, the following models are expected to be excluded from iOS 26 and remain on iOS 18:

• iPhone XR

• iPhone XS / XS Max

• Older models such as iPhone X, 8, 8 Plus, etc.

While these devices won't become unusable immediately, security updates and new features will cease, so caution is advised for long-term use. When purchasing a used device, it's recommended to consider "iOS 26 compatibility" as a key factor.

PRODIG's used iPhone lineup here
https://prodig-shop.com/collections/iphone

iPad and Mac Compatibility and Practical Usage Lines for Study/Work

In conjunction with the iOS 25/26 transition, iPadOS 26 and macOS 26 will also see revisions to their compatible models. For iPads, while some models from before 2019 will no longer be supported, most of the iPad series (vanilla), iPad Air series, and iPad Pro series will continue to receive support.
For study or video viewing, A12-A14 generation iPads are still practical enough, but if you want to utilize AI features like Apple Intelligence, newer chip-equipped (M-series or A18 generation and later) iPad Pro or iPad Air models are better candidates.

Roughly categorized by usage, it looks like this:

• For study / light video viewing:

  • Relatively newer generations of the iPad series (vanilla)

• For work / creative use:

  • M-series equipped iPad Air series, iPad Pro series

• Also want to utilize Apple Intelligence:

  • M-series equipped iPad Pro / Air

PRODIG's used iPad series lineup here
https://prodig-shop.com/collections/ipadseries

PRODIG's used iPad Air series lineup here
https://prodig-shop.com/collections/ipad-air

PRODIG's used iPad Pro series lineup here
https://prodig-shop.com/collections/ipad-proseries

Tips for Roughly Estimating Lifespan by Chip Generation

When considering the "lifespan" of used or older devices, it's more effective to look at the "chip generation" rather than just the model name. Keeping the following rough guidelines in mind can help you make a decision:

• A13 (iPhone 11 generation)

  • The oldest model supported by iOS 26.

  • Still viable for several years with light usage.

• A14 (iPhone 12 generation)

  • 5G support and performance are sufficient, offering good cost performance.

• A15 (iPhone 13 generation)

  • The "just right" balance of performance and price for many users.

• A16 (iPhone 14 generation) and later

  • Comfortably handles camera, gaming, and AI features.

By keeping these general chip generation "margins" in mind, you can better estimate "how many more years this device can serve as my main device." PRODIG carefully lists specifications, condition ranks, and maximum battery capacity on product pages, so you can check detailed specs if a particular model interests you.

How to Choose a Used iPhone in the iOS 26 Era [Safe, Affordable, Practical]

Image candidate: A photo of three generations of iOS 26-compatible used iPhones arranged on a white desk, comparing price and usage.

From here, we will explain how to choose a used iPhone for those who are "cost-conscious but cautious about used items." The key is to find a good balance between "safety," "affordability," and "practicality."

While prices are significantly lower than new devices, you might worry about things like "Is it really okay?", "Will OS support be cut off soon?", or "Is the battery degraded?". At PRODIG, we sell inspected and cleaned devices categorized by condition rank and offer a performance guarantee, helping to alleviate these concerns.

PRODIG's used iPhone lineup here
https://prodig-shop.com/collections/iphone

Recommended Generations for Price-Conscious Buyers (iPhone 12, 13, etc.)

For those who prioritize price but still want to use a device reliably for several years, the iPhone 12 and iPhone 13 generations are particularly recommended.

• iPhone 12 series

  • 5G compatible and sufficient for video viewing, social media, and casual gaming.

  • Equipped with the A14 chip, it still performs well even with iOS 26.

• iPhone 13 series

  • A15 chip provides more headroom, and camera performance is improved.

  • Good battery life, making it suitable for long-term use as a primary device.

While buying a brand new, latest iPhone can be expensive, choosing a used model that's one to three generations old allows for significant cost savings while still providing ample OS support and performance.

At PRODIG, inventory and pricing for each generation fluctuate, so comparing the 12 series and 13 series based on your budget is also a good idea.

Click here for a list of used iPhone 12 series at PRODIG
https://prodig-shop.com/collections/iphone-12series

Click here for a list of used iPhone 13 series at PRODIG
https://prodig-shop.com/collections/iphone-13series

Which generation is comfortable for camera and gaming?

If you prioritize camera performance and gaming performance, it's safe to aim for A15 chip or later (iPhone 13 series and newer). Features for video and photo shooting, such as Night mode and Cinematic mode, are also enhanced, making it highly satisfying for those who value sharing on social media.

• Camera-focused:

  • Pro series from iPhone 13 Pro / 13 Pro Max onwards offer high-end features like telephoto lenses and ProRAW shooting.

  • However, considering the balance with price, the regular 13 and 14 also offer sufficiently high image quality.

• Gaming-focused:

  • A15 and later have ample processing power, making 3D games comfortable.

  • Choosing a 120Hz ProMotion display (Pro series) enables even smoother visuals.

If you want to enjoy both camera and gaming while prioritizing cost-performance, aim for a "higher storage iPhone 13 series" or a "standard model iPhone 14 series."

Click here for a list of used iPhone 14 series at PRODIG
https://prodig-shop.com/collections/iphone-14series

Click here for a list of used iPhone 15 series at PRODIG
https://prodig-shop.com/collections/iphone-15series

Understanding condition ranks and maximum battery capacity (S/A/B/C)

When choosing a used iPhone, the "cosmetic condition" and "battery condition" are important. At PRODIG, we categorize the exterior condition of devices into the following ranks:

Condition Ranks
S Rank: New, unopened item.
A Rank: Very good condition. Minor scratches or signs of use, but generally clean.
B Rank: Good condition. Visible scratches or small dents from normal use, but no issues with functionality.
C Rank: Fair condition. Noticeable scratches or paint peeling, but no impact on functionality.

For those who don't mind cosmetic imperfections, choosing a B or C rank can further reduce the price. On the other hand, if it's for a gift or business use, an A rank or higher is recommended for greater satisfaction.

Also, it's important to check the maximum battery capacity. If the "Battery Health" shown in the iOS settings app is 90% or higher, the perceived battery life is usually sufficient. PRODIG also offers devices with specified battery conditions or replaced batteries, catering to careful buyers who "want a device with no battery concerns."

Utilizing iOS 26 and iPad: Optimal generations for a secondary device or work tablet

In the context of iOS 25/26, updates for the iPad are also a concern, not just the iPhone. For those considering buying a tablet as a secondary device, important points are "how old is too old for an iPad series" and "which generation of iPad Air or iPad Pro offers good cost-performance."

Cost-effective iPad series for learning and video viewing

For learning and video viewing tablets, the iPad series (standard) offers the best cost-performance. Even used or older models can be used comfortably if you keep the following points in mind:

• iPad series with A12 to A14 chips can run learning apps and video viewing without problems.

• With around 64GB to 128GB of storage, you can comfortably save apps, learning materials, and offline videos.

• Choosing an iPadOS 26 compatible model means it can be used reliably for several years even in the iOS 26 generation.

For those who want to enjoy online classes, e-books, and video subscriptions while keeping costs down, a used iPad series is a very balanced choice.

Click here for a list of used iPad series at PRODIG
https://prodig-shop.com/collections/ipadseries

Which generation of iPad Air/iPad Pro to aim for if for work

For work and business use, the iPad Air series and iPad Pro series are recommended. In particular, generations equipped with M-series chips can fully handle PC-like tasks such as multitasking, external display output, and note-taking/document annotation with Apple Pencil.

• iPad Air series

  • Lightweight and portable, fits easily into business bags.

  • Models with M-series chips can expect long-term OS support.

• iPad Pro series

  • High refresh rate displays and high-performance speakers are ideal for creative uses.

  • Comfortable for multitasking and external display use, can easily replace a laptop.

Used iPad Air / iPad Pro from one to two generations ago are more affordable and offer great cost-performance. If you want to introduce multiple devices for business use, you can consult PRODIG's corporate sales department for proposals tailored to your budget and needs.

Click here for a list of used iPad Air series at PRODIG
https://prodig-shop.com/collections/ipad-air

Click here for a list of used iPad Pro series at PRODIG
https://prodig-shop.com/collections/ipad-proseries

Corporate Sales Contact
https://prodig-shop.com/pages/b2b-reception

Smart ways to use iOS 26 with an iPhone and iPad combo

In the iOS 26 generation, the seamless integration between iPhone and iPad is even greater. For example, it's now common to handle notifications received on an iPhone with an iPad, or to automatically sync photos taken on an iPhone to an iPad for viewing.

For a two-device setup, the clear division of roles is "main device = iPhone" and "secondary device = iPad." Specifically, the following combinations can be considered:

• Main: iPhone 13/14 or similar

  • All-in-one for daily use: calls, messages, SNS, camera, etc.

• Secondary: iPad series (for learning/videos)

  • Used specifically for YouTube, Netflix, e-books, and learning apps.

Or, for business-focused individuals:

• Main: iPhone 14/15 series

• Secondary: iPad Air or iPad Pro (for meeting notes, document viewing, and on-the-go work)

This approach can also be effective. By combining used devices or rentals, it's recommended to create a flexible environment with two older models rather than one new flagship device, at a lower cost.

iOS updates and the used market: "Best time to buy and sell"

Finally, let's touch on the "best time to buy and sell"—when is it most advantageous to buy, and when can you minimize losses when selling? During major updates like iOS 26, used market prices tend to fluctuate.

How used market prices move before and after major updates

Generally, price fluctuations are more likely to occur at the following times:

• New OS announcement (e.g., WWDC)

  • When news of end-of-support for older devices comes out, their used prices gradually decline.

• Immediately after new iPhone launch

  • The previous generation (e.g., iPhone 15 when iPhone 16 is released) tends to drop in price.

• Immediately after major update release

  • Many people wait to see reviews regarding bugs or performance speed.

While "generations confirmed compatible with iOS 26" are expected to have stable demand in the used market, "generations confirmed incompatible with iOS 26" tend to gradually decrease in value. If your current device is found to be incompatible, selling it "before any major performance issues arise" is likely to maintain a relatively higher trade-in value.

Considerations for the best time to sell your current iPhone

When considering the timing to sell your current iPhone, keeping these three factors in mind can help you make a decision:

1. OS support status

2. Battery and exterior condition

3. Plan for switching to a new device

Especially right after OS support ends, more people consider upgrading due to concerns about future usability, even if the device still works. As a result, a large number of devices from the same generation enter the used market, making buyback prices tend to drop. Conversely, if you sell early, when rumors of end-of-support begin to circulate, you can expect a relatively higher buyback price.

PRODIG's buyback service offers in-store trade-ins at our Akihabara location. While we do not offer mail-in or online appraisals, customers who can visit the store appreciate the peace of mind of having their device physically inspected.

PRODIG Buyback Site here
https://prodig-kaitori.com/

How to utilize PRODIG's sales, trade-in, rental, and corporate services

To consider the total lifecycle of a device, combining sales, trade-ins, rentals, and corporate support is a smart choice.

• Sales (online store / Akihabara physical store)

  • Get used, outlet, or older model iPhones/iPads at a good cost-performance.

• Trade-in (in-store trade-in)

  • Convert unused devices into cash to fund your next device purchase.

• Rental

  • Addresses needs like "I only need a device for an event" or "I want to try a new model for a short period."

• Corporate sales contact

  • Proposes optimal device configurations and replacement timings for companies looking to review their internal business devices.

By skillfully combining these services, it becomes easier to "build an iOS 26 generation environment with minimal cost and replace devices as needed."

PRODIG Official Online Store here
https://prodig-shop.com/

PRODIG Rental is here
https://prodig-rental.com/

For corporate inquiries, please click here
https://prodig-shop.com/pages/b2b-reception

Frequently Asked Questions (FAQ) | iOS 25/26 and Used iPhone Questions Answered

Finally, here is a summary of frequently asked questions regarding "iOS 25," "iOS 26," and "used iPhones." By organizing common questions that arise during searches, you can more easily make the best choice for yourself.

Q1: Will iOS 25 actually be released? What happens if I don't update?

A: "iOS 25" as a name will not be released, and the next major version is expected to be "iOS 26." If you don't apply the update from iOS 18, your device won't immediately become unusable, but you will stop receiving new features and security updates, which increases long-term risks. For compatible models, it's generally safe to back up your data and then apply the update.

Q2: Will updating an old iPhone to iOS 26 slow it down?

A: iOS 26 is designed for models with the A13 chip (iPhone 11) or later, but the older the generation, the more likely it is that enabling all the latest features will affect perceived speed. Visual-heavy UIs and AI features, in particular, tend to place a high load on the device.
If you experience slowness after updating, try the following measures for improvement:

• Reduce unnecessary background apps and widgets

• Turn off some parallax effects and animations

• Free up storage space (ideally 20% or more of the total)

If you still experience significant stress, it might be time to consider upgrading to a slightly newer generation that supports iOS 26.

Q3: Is it okay to update a used iPhone to the latest iOS?

A: If a used device is an iOS 26-compatible model, you can generally update and use it without issue. What's important is not just "the OS being up to date," but also "the hardware's condition" being properly managed.

At PRODIG, we only sell devices that have been checked for functionality and cleaned, and we clearly indicate their condition rank and maximum battery capacity. Furthermore, we offer a warranty for a certain period, so even those who are "a bit hesitant about used items" can relatively safely try out the world of the latest OS.

Q4: What are the key points when replacing multiple devices for corporate use?

A: When replacing multiple devices for corporate use, keeping the following points in mind can help balance operational load and cost:

• Pre-determine the device refresh cycle (e.g., every 3 years)

• Standardize on iOS 26-compatible generations or later, and align OS support periods as much as possible

• Operate some devices via rental to flexibly respond to peak seasons and short-term projects

• Effectively utilize used devices by buying them back or reusing them internally

PRODIG's corporate desk can provide comprehensive support, from designing such operational policies and selecting devices to planning the replacement cycle after implementation.

For corporate inquiries, please click here
https://prodig-shop.com/pages/b2b-reception

Finally

Image suggestion: A photo of an iPhone and iPad on a white desk, with a calendar and budgeting app in the background, to evoke an "OS Update Plan."

The keyword "iOS 25" involves confusion due to a name change, but essentially, it's about considering "how well your device can adapt to the new generation of iOS 26."

• iOS 19-25 will be skipped, and the next major version will be released as "iOS 26."

• iOS 26 will bring significant changes in both appearance and AI, with Liquid Glass design and Apple Intelligence.

• Compatible devices are primarily iPhone 11 or later and iPhone SE 2nd generation or later, with older generations gradually losing support.

• When choosing a used or older model, it's important to consider "iOS 26 compatibility" and "a chip generation that will be usable for several more years."

By keeping these points in mind, you can choose the best device for yourself without unnecessary anxiety.

At PRODIG, we offer a wide range of used iPhones and iPads, prioritizing "peace of mind, affordability, and practicality." We aim to be a partner for those who want to set up their device environment for the iOS 26 era "efficiently and wisely," through not only sales but also trade-ins, rentals, and corporate support.

Whether you're starting to feel dissatisfied with the performance of your current iPhone or iPad, or you still have some leeway but are curious about the future of OS support, check out PRODIG's lineup and consider the best device (or combination of two devices) for you.

Click here for PRODIG's used iPhone lineup
https://prodig-shop.com/collections/iphone

PRODIG Official Online Store is here
https://prodig-shop.com/

Sources

9to5Mac

Apple

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