The oldest iOS these games still run on, in one table

The usual way to find out whether a game will run on an ageing iPhone is to install it and see. There is a faster way, and it is printed on every App Store listing: the minimum iOS version the app will accept. It is a hard floor rather than a recommendation — below it, the store will not let you install at all.

Across the sixteen games in our directory that number turns out to be lower than most people assume, and it clusters tightly.

Check your own version first

On an iPhone or iPad, open Settings › General › About and read the Software Version line. That number is what the table below is comparing against. If your phone is on a newer version than the one listed for a game, the operating system is not what is standing in your way.

What the sixteen listings say

Read from Apple's lookup service on 27 July 2026, for the United States storefront. The size column is the download the listing reports.

The spread is four minor versions wide, from iOS 11.0 at the bottom to iOS 15.0 at the top, and nothing on the list goes above that. The pattern is not what you would guess from the games themselves either: the heaviest downloads here sit on some of the lowest floors, while several of the smallest apps ask for the newest OS.

The OS floor and the hardware demand are different questions

It is tempting to read the minimum version as a proxy for how demanding a game is. It is not. A publisher sets that floor around the frameworks the app needs and the audience it is willing to drop, which is a business decision as much as a technical one — a game with hundreds of millions of installs has more to lose by cutting off old devices than a new release does.

What actually stops an older phone

• Free storage. The download column above is the starting point, not the finish. Several of these games pull down substantial extra data after first launch, and a phone that is nearly full will fail partway through an update rather than at install time.
• Heat. Phones slow themselves down when they get hot, so long sessions get worse the longer they run. This is the limit people actually hit, and it has nothing to do with which iOS you are on.
• Update headroom. A live game needs free space to apply an update on top of the space it already occupies. Sitting at a few hundred megabytes free is how you end up unable to launch a game you had been playing fine.

Both of the first two have their own guides here: why mobile games eat your storage, and what is safe to delete, and how to stop mobile games draining your battery, which is largely a guide to keeping a phone cool enough to keep going.

A note on Android

This table is iOS only, deliberately. Google Play states Android requirements in a form that varies by device rather than as a single comparable number, so lining the two up in one table would produce a comparison the underlying data does not support. If you are on Android, the store listing for your specific device is the answer, and it is the only one worth trusting.