Can you install an iOS app targeting 17.2 with support for 16.7.2 on an iPhone running 17.3.1?

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Level 1

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Can you install an iOS app targeting 17.2 with support for 16.7.2 on an iPhone running 17.3.1?

I'm a developer. I'm having an issue that I've never seen before and I'm wondering if it's a version issue. I'm currently running a previous version of my app that is working just fine. When I go to install a new version of my app (sideloaded), I find that the installation seems to work, but the app does not upgrade. I see the Verifying, Loading, and Installing messages showing the progress of the app install. When I open the app, I notice that the version has not changed. The answer to the title of my question will help me either resolve the issue or narrow down the problem. Thanks!

iPhone 12

Posted on Feb 26, 2024 9:37 AM

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Answer 1

dumber_texan Author

Level 1

4 points

Mar 1, 2024 10:26 AM in response to dumber_texan

I finally solved the issue. The answer to my question is yes. You can install an app that targets older versions of iOS than what is currently installed on your device.

The actual problem that was causing the version issue was due to AppLinks code. I have since commented out the AppLinks code (a few lines in 4 files) that was causing the issue.

applinks | Apple Developer Documentation

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Answer 2

MrHoffman

Level 10

154,577 points

Feb 26, 2024 10:43 AM in response to dumber_texan

Is the app ID different in the two apps?

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Answer 3

dumber_texan Author

Level 1

4 points

Feb 26, 2024 11:05 AM in response to MrHoffman

No, it is the same app ID. It is the same app.

It's a .Net MAUI app. I'm incrementing the ApplicationDisplayVersion each time and then displaying that information on the login page. Usage of the ApplicationDisplayVersion is not working correctly in other areas, so I know the app is not updating.

<!-- Versions -->
<ApplicationDisplayVersion>1.0.20</ApplicationDisplayVersion>
<ApplicationVersion>1</ApplicationVersion>

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Answer 4

MrHoffman

Level 10

154,577 points

Feb 26, 2024 11:16 AM in response to dumber_texan

This is seemingly centrally something with Microsoft .NET MAUI behavior around installs, updates, and side-loading.

Check with the .NET MAUI framework maintainers, as what you’ve shown isn’t (directly) an App ID.

Looks like that framework uses a discussion forum here: https://github.com/dotnet/maui

Two tickets are part of the USD$99, though more can be purchased.

But thr e use of that framework complicates things.

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Answer 5

lkrupp

Level 7

25,073 points

Feb 26, 2024 11:08 AM in response to dumber_texan

You should be asking this question in the Developer’s forum. After all, you do pay $99/yr to have access to your developer account for support. You are a registered developer, right?

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Answer 6

dumber_texan Author

Level 1

4 points

Feb 26, 2024 11:10 AM in response to lkrupp

Yes, I am. I thought we only get a couple of support tickets per year. Has this changed or do we still only get 2?

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Can you install an iOS app targeting 17.2 with support for 16.7.2 on an iPhone running 17.3.1?

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