How to Fix a Bad App Update Without Re-Publishing

When Updates Go Wrong

If a production update introduces a severe crash, it can affect a significant portion of your users.

Without OTA, you have to identify the bug, fix it, rebuild, resubmit to Apple/Google, and wait days for approval. Meanwhile, your App Store rating is negatively impacted.

With Upflux, you can rollback immediately.

The OTA Solution: Instant Rollback

Upflux maintains a history of every release you make. Because the updates are essentially JavaScript bundles, "rolling back" is as simple as telling the app to load the previous bundle.

# The magic command
upflux rollback --deployment production

That's it. Within minutes, as users open their apps, they are silently moved back to the last stable version. No app store submission required.

Step-by-Step Recovery Guide

Step 1: Identify the Problem

Monitoring is key. Use tools like Sentry, Bugsnag, or Firebase Crashlytics. If you see a spike in errors correlating with your new release label (e.g., v1.0.2), you have a problem.

Step 2: Stop the Bleeding (Rollback)

Don't try to "fix forward" if the issue is critical. Roll back immediately to stop the crashes.

upflux rollback --deployment production --target-release v1.0.1

Step 3: Reproduce and Fix

Now that production is safe, you can take your time.

1. Pull the bad commit locally.
2. Reproduce the crash.
3. Implement the fix.

Step 4: The Recovery Release

Once fixed, deploy the new version. We recommend a staged rollout for this recovery release to be extra safe.

upflux release --label v1.0.3-hotfix --rollout 10

Post-Mortem Template

After the dust settles, write a post-mortem.

• Impact: How many users were affected?
• Root Cause: What line of code caused it? Why did tests miss it?
• Recovery Time: How long from detection to rollback? (With Upflux, this should be < 5 minutes).
• Action Items: Improve test coverage, add more staging QA steps.

Prevention is Better Than Cure

1. Use Staged Rollouts: Never go to 100% immediately.
2. Test on Staging: Always deploy to a device pointing to the Staging environment first.
3. Use Upflux: Sign up for free to get the undo button for your mobile app.