App is slow during cold start

Need help
1

Hi bubble.io community,

I have successfully launched my first bubble app into the Play and Apple Store, which I am very proud of but i noticed that my bubble app takes very long for the first cold start, estimated around 10 seconds before the index page shows. But if I close the app and open it immediately, it is much faster. Any reasons for this? And if there is any way to solve this.

For context my app is built using app wrapper by ZeroQode and my app index page is mainly run by states, not url parameters.

Any insight will be helpful. Thank you.

2

Hi @blackarcherei ,

Thanks for reaching out and congratulations on launching your first Bubble app! :tada:

To help us investigate the cold start issue, could you please provide a few additional details:

  • The name of your app
  • The device and OS you’re testing on
  • Steps to replicate the slow start (e.g., launching from fresh install, after closing, etc.)

Also, do you notice this on both iOS and Android, or is it specific to one platform? This will help us determine if it’s related to the OS, the wrapper, or your app configuration.

Looking forward to your reply!

Best regards,
Support Team
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3

Thank you Zeroqode. The name of my app is Metro Town (BETA). The cold start occurs on both devices.
Metro Town (BETA) - Apps on Google Play

  • To replicate the slow start. open the app after clearing all cache or open it after a few minutes. It will take appx 10-20s to load. If you were to close the app and open it immediately it will be fast.

Testing on:
Device: iPhone 13
OS: iOS 18.7.1

Device: S22+
OS: Android 15.

Hope you can look into it and thanks for the prompt response.

4

Hi @blackarcherei ,

Thank you for providing those detailed steps and device information. Apologies for the delayed response over the weekend.

We tested Metro Town (BETA) on our side using Pixel 7 and Pixel 9 devices running Android 16. After clearing the cache and waiting several minutes before reopening (to replicate the cold start scenario you described), we observed boot times of approximately 4-5 seconds. We did not encounter any performance issues during our testing.

Given that you’re experiencing 10-20 second load times on your S22+ (Android 15) and iPhone 13 (iOS 18.7.1), there may be device-specific or OS-specific factors at play.

Could you please confirm:

  • Are you testing on a stable internet connection?
  • Do you have any battery optimization settings enabled that might affect the app?
  • Approximately how much free storage space is available on each device?

This information will help us investigate further and identify what might be causing the longer load times on your devices.

Best regards,
Support Team
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