# IOS test problem **URL:** \ **Category:** Questions about Thunkable X\ **Created:** [February 17, 2021, 2:33pm UTC](https://community.thunkable.com/t/ios-test-problem/1104253 "2021-02-17T14:33:52Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![cyberdriver](https://avatars.discourse-cdn.com/v4/letter/c/5e9695/32.png) [@cyberdriver](https://community.thunkable.com/u/cyberdriver)\ **Post date:** [February 17, 2021, 2:33pm UTC](https://community.thunkable.com/t/ios-test-problem/1104253/1 "2021-02-17T14:33:52Z")
I downloaded my app for iOS. It worked perfectly fine yesterday. Today, it suddenly won’t open and crashes instantly. I haven’t installed a new version of the app since it was working yesterday. It also works fine in the Thunkable live app. I tried deleting the app and getting a new download link. Now when I try to open it, it says “this app could not be installed because it’s integrity could not be verified”. I went to settings-\>general-\>profiles and there is nothing there for Thunkable. Any ideas why this would happen suddenly? ---
**Author:** ![aarav-work](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/aarav-work/32/95738_2.png) [@aarav-work](https://community.thunkable.com/u/aarav-work)\ **Post date:** [February 17, 2021, 2:46pm UTC](https://community.thunkable.com/t/ios-test-problem/1104253/2 "2021-02-17T14:46:15Z")
Thunkaable may have gone down for an hour or 2 ---
**Author:** ![cdvierone](https://avatars.discourse-cdn.com/v4/letter/c/b77776/32.png) [@cdvierone](https://community.thunkable.com/u/cdvierone)\ **Post date:** [February 17, 2021, 4:07pm UTC](https://community.thunkable.com/t/ios-test-problem/1104253/3 "2021-02-17T16:07:52Z")
Hi I have a same problem, yesterday may app is perfect, today when I open my app, it’s close after 1 second. I remove my app and reinstalled it. It is necessar, after download, in “device management” confirm in “Thunkable,inc”.after work perfectly. ---
**Author:** ![cyberdriver](https://avatars.discourse-cdn.com/v4/letter/c/5e9695/32.png) [@cyberdriver](https://community.thunkable.com/u/cyberdriver)\ **Post date:** [February 18, 2021, 12:28pm UTC](https://community.thunkable.com/t/ios-test-problem/1104253/4 "2021-02-18T12:28:49Z")
> [@cdvierone](#): > > device management” confirm in “Thunkable,inc”.after work perfectly. My issue is that there is no device management in settings. It just says profiles and there is nothing for Thunkable. When I used to download it, it said that I have to approve it in settings. Now it says it’s integrity could not be verified. ---
**Author:** ![cdvierone](https://avatars.discourse-cdn.com/v4/letter/c/b77776/32.png) [@cdvierone](https://community.thunkable.com/u/cdvierone)\ **Post date:** [February 18, 2021, 3:14pm UTC](https://community.thunkable.com/t/ios-test-problem/1104253/5 "2021-02-18T15:14:19Z")
I was hoping to help you, after downloading and installing the app, I went to “General” and under VPN it appears “thunkable, inc” I confirmed them and everything works fine, see attachment ![File_000](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/7/2/728d8ede4ac0c058fd3ea1f934d26c5217ea1bf1.jpeg) ciao ---
**Author:** ![cyberdriver](https://avatars.discourse-cdn.com/v4/letter/c/5e9695/32.png) [@cyberdriver](https://community.thunkable.com/u/cyberdriver)\ **Post date:** [February 18, 2021, 3:30pm UTC](https://community.thunkable.com/t/ios-test-problem/1104253/6 "2021-02-18T15:30:07Z")
Yes. I know you have to go to device management under vpn. I try that but there is no device management menu for me. It just says profiles and I went through it and approved all of it. There was not option for Thunkable inc. So, I understand what you are saying and I have done that in the past but it is not showing up for me in settings. See attachments. ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/b/f/bf24d5822cdddff21a51732e214e621369b4018b.jpeg) ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/1/7/1796a62685872e8f07b9bed8172ed4c992feff6f.jpeg) ---
**Author:** ![ioannis](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/ioannis/32/146956_2.png) [@ioannis](https://community.thunkable.com/u/ioannis)\ **Post date:** [November 8, 2024, 1:29pm UTC](https://community.thunkable.com/t/ios-test-problem/1104253/7 "2024-11-08T13:29:23Z")