With each Apple OS update, users eagerly anticipate improvements in performance, battery life, and innovative features. What does iOS 15 bring to the table, and is it the right time to make the leap?

Curious about this matter, many are seeking answers. I'll take you on a tour, compiling user feedback on iOS 15. Check it out to decide whether upgrading to iOS 15 is right for you!
Does Upgrading to iOS 15 Affect Battery Life and Performance?
Users are particularly concerned about iPhone battery life when upgrading to a new iOS, especially with substantial updates like iOS 15. Does iOS 15 drain the battery? Let's find out.
Upgrading to iOS 15: Unveiling Battery Life and Performance ConcernsInitially, many users are experiencing increased heat and rapid battery depletion after updating to the new iOS 15.
This isn't uncommon, as major updates put a strain on your iPhone's resources for optimization. Based on past updates, the device tends to stabilize after a short period or, at the latest, with the next minor update.
International YouTube channels have conducted battery tests comparing iOS 14.8 and iOS 15 on various iPhone models from 6S to 12. Check the results below for more insights.
Simulating real-world usage, this YouTuber posted a video for about an hour, followed by an hour of Instagram browsing, Minecraft gaming, Safari web browsing, and more.
On iOS 15, the battery life of iPhone 12 has significantly increased by 30 minutes - lasting 8 hours and 40 minutes in the test compared to 8 hours and 10 minutes on iOS 14.8.
Battery life for iPhone 11 remains unchanged, lasting 7 hours and 28 minutes on iOS 15 and 7 hours and 32 minutes on iOS 14.8. Similarly, iPhone XR achieves 6 hours and 3 minutes compared to 5 hours and 59 minutes. iPhone 8, iPhone 7, and iPhone 6s also show comparable battery life on iOS 15 compared to iOS 14.8.

For everyday light tasks, it's evident that iOS 15 provides equivalent or even better battery life on the newer iPhone models.

In terms of performance, user feedback varies depending on the iPhone model. The performance of iPhone 11 and 12 remains relatively stable or even slightly improves, while some older models like iPhone X and earlier show signs of gradual weakening.

Performance scores are just numbers for comparing the correlation between two iOS versions. According to 24h Cong Nghe's reviews on the performance of iPhone 11 and XR, gaming experiences are nearly identical. Performance degradation and faster battery depletion occur only when the device gets excessively hot.
See more:
- Review of iPhone XR on iOS 15 Official Update: How's the performance and battery?
- Review of iPhone 11 with iOS 15 Official Update: What's new in iOS 15?

Hence, some voices in the iPhone community, as well as retailers, recommend upgrading to iOS 15 for iPhone Xs and newer models, while suggesting consideration for older models.
Apart from the device model, various factors can influence the decision, such as the battery health percentage, the number of installed apps, and the amount of stored documents, photos, and videos.
Discover the Exciting Features Unveiled in iOS 15

One standout feature generating much buzz since the early days of iOS 15 release is Live Text, enabling users to copy text directly from images through the camera app.
Additionally, it can be used directly on the web if you use the Safari browser. Note that it's only compatible with iPhone Xs and newer models.
See more: How to Use Live Text to Recognize Text in Images on iPhone.
This feature proves handy for extracting text, phone numbers, or keywords, allowing quick translation and easy drag-and-drop into convenient note-taking apps.
Despite its popularity, practical usage in Vietnam is not widespread yet due to lack of support for Vietnamese language recognition and occasional confusion with punctuation marks in other languages.

The user-favorite change lies in the redesigned notification interface, offering clearer icons and content display, along with the ability to condense multiple notifications using Notification Summary.

Apple has enhanced user personalization with the Focus feature, allowing customized notification reception from specific people and apps. It lets you see only what you want, going beyond the previous all-or-nothing approach of Do Not Disturb.
Overall, iOS 15 doesn't introduce a plethora of groundbreaking features. If you were expecting a 'WOW' interface change akin to iOS 14, this update may not meet those expectations.
Any Issues and Should You Upgrade to iOS 15 Right Now?
Upon a quick survey, it appears that, similar to previous major updates, compatibility issues with apps are quite common.

Many users report issues such as Facebook freezing when clicking on an image, Messenger not displaying message notifications, and the need to multitask to restore normal functionality.

Another prevalent issue is FaceTime not recognizing eSIM, requiring users to reactivate it.

In general, iOS 15 doesn't seem to have major security vulnerabilities but rather experiences some instability issues, often attributed to third-party apps that haven't been optimized for the update.

However, since these issues are related to software, stability can be restored with just a few updates from third-party apps or Apple.

As for the crucial question of whether to update at this time or not, some recommendations suggest that for iPhone Xs and newer models, if you want to experience the changes and new features, upgrading to iOS 15 is a good choice.

However, if you prioritize stability and want to avoid potential nuisances with a fresh update, sticking with iOS 14.8 or an older version is a safe option, given that Apple continues to provide full security updates.
Another optimal option is to wait for a more stable version of iOS 15, perhaps iOS 15.1, which is likely to offer significantly improved stability, especially for older devices.
Conclusion
Above are my insights into the new features of iOS 15 and user feedback on this new operating system. I hope this article helps you assess iOS 15 clearly and make an informed decision on whether to upgrade or not.

Have you updated to iOS 15? If yes, have you discovered any new features or encountered any issues? Feel free to share in the comments below!
See more:
- Comparing Battery Life between iOS 15 and iOS 14.8 Across Various iPhone Models.
- Latest iOS 15 Review: Introducing Exciting New Features, Is It Worth Updating?
- Apple Enables iOS 15.1 Beta 1 Experience, Unveiling New Upgrades.
- Exploring Magicut on iPhone with Hot Video Editing Features
