Hi! I understand your Sainsbury’s SmartShop app is running slowly on your iPhone. Let’s get that sorted out together. Could you share a bit more? For example, does the app take a long time to open, load pages slowly, or is there lag when scanning items?

Meanwhile, here’s a step-by-step approach to improve the app’s performance on iOS 16.1:

1. Close and Reopen the App
Double-click the home button or swipe up from the bottom (depending on your iPhone model) to see open apps, then swipe the SmartShop app off the screen to close it. Reopen it to see if speed improves.

2. Check Your Internet Connection
The app relies on your internet. Make sure your Wi-Fi or mobile data is strong and stable. If you’re in-store, reconnect to their Wi-Fi if possible.

3. Clear the App Cache (via App Offload/Reinstall)
Since iOS does not allow clearing cache manually for most apps, try this:
- Go to Settings > General > iPhone Storage
- Find SmartShop, tap it, then choose “Offload App” which frees up space but keeps your data.
- After offloading, tap “Reinstall App.” This can clear temporary files that might be slowing the app.

4. Restart Your iPhone
Simply turn your iPhone off and on again. This can clear temporary system glitches.

5. Update the App
Open the App Store > tap your profile icon at the top right > scroll to see if SmartShop has an update available and install it.

6. Restart Network Settings (if needed)
If internet problems persist, you can reset network settings:
Settings > General > Reset > Reset Network Settings (note: this will erase saved Wi-Fi passwords).

If after these steps the app is still slow, let me know what you’ve tried and any error messages or specific slow behaviors you notice. I’m here to help!

Are you satisfied with these steps so far?