How to Downgrade iOS 26 to iOS 18 Without a Computer

 Apple’s iOS updates always bring exciting new features, but sometimes the latest version isn’t the best for everyone. With iOS 26 rolling out, many users rushed to update their iPhones only to find problems — battery draining faster, certain apps crashing, or performance issues on older devices.

If you regret updating, you might be wondering: is it possible to downgrade from iOS 26 back to iOS 18 without using a computer? The answer is tricky. Officially, Apple doesn’t want you to downgrade, but there are workarounds. In this guide, I’ll break down what you can (and can’t) do.

How to Downgrade iOS 26 to iOS 18 Without a Computer

Why Downgrading Is Complicated

Apple signs firmware (IPSW) files for only a short time after releasing new iOS versions. Once they stop signing iOS 18, you can’t restore it directly from Apple’s servers. Normally, you’d need a computer with iTunes or Finder to load the IPSW file manually.

But for users who don’t want to use a PC or Mac, there are some creative alternatives.

Method 1: OTA Profiles (If Still Signed)

If Apple is still signing iOS 18, you can sometimes install it directly through an OTA (over-the-air) profile.

1. Download an iOS 18 OTA profile from a trusted source (some websites and communities share them).

2. Install the profile on your iPhone.

3. Go to Settings → General → Software Update.

4. You should see iOS 18 appear — download and install it.

⚠️ This only works while Apple is still signing iOS 18. Once signing closes, this method won’t work.

Method 2: Jailbreak Tweaks

If your device is jailbreakable on iOS 26, you can install tweaks that replicate the iOS 18 look and feel. Some jailbreak tools even allow “faux downgrades” where the system reports iOS 18 to apps, letting you bypass version restrictions.

This isn’t a real downgrade, but it can give you the stability and compatibility you’re looking for.

What You Can’t Do Without a Computer

Let’s be clear:

1. You can’t flash IPSW files without a computer.
2. If Apple has stopped signing iOS 18, you can’t officially install it again.
3. True downgrades (restoring the firmware) require iTunes/Finder on a PC or Mac.

So, “no computer downgrade” is only possible while Apple is still signing iOS 18, or through partial workarounds.

Final Thoughts

Downgrading iOS 26 to iOS 18 without a computer is possible only in limited cases:

1. If Apple is still signing iOS 18, you can use an OTA profile.
2. If not, your best options are third-party tools or jailbreak tweaks that mimic iOS 18.

For a full and proper downgrade, you’ll eventually need a computer. But if you just want your apps to run smoothly again, the workarounds above can be enough to hold you over.