Gluchol

Gluchol helps people understand the likely impact of foods on blood sugar, cholesterol and blood pressure: scan a meal, a barcode or a restaurant menu and get clear, colour-coded insights. I joined after recent backend and integration changes had left the React Native app, the backend logic and the stored data out of step. My job was to find the real causes and make the product dependable again on iOS and Android, without rebuilding what already worked.

Several core workflows had become unreliable: subscription upgrades, ad unlocks, navigation and saved actions. Symptoms showed up in the mobile interface, but the causes sat in backend logic, database state or the connection between the layers.

Fixing the screens alone would have hidden the problems for a week. The app, the backend and the data had to be treated as one connected system.

1. 01

   Traced issues across the whole stack

   Reviewed the app, the backend, database behaviour and monetisation flows together, and followed each symptom back to its real cause.

2. 02

   Subscriptions that behave

   Fixed the subscription upgrade flow and subscription management for subscribed users on iOS and Android.

3. 03

   Reliable ad unlocks

   Resolved the reported ad loading and ad-unlock issues so free users get what the app promises.

4. 04

   Navigation and save actions

   Improved navigation and screen transitions, and fixed save interactions that sometimes needed a second tap.

5. 05

   Release verification

   Verified every repaired flow in release-distributed builds on both platforms before it reached users.

React Native and Expo

The cross-platform app shipped on iOS and Android.

RevenueCat

Subscriptions and entitlements across both stores.

AdMob

Ads and rewarded unlocks for free users.

Disconnected technical issues became a dependable experience across the core workflows, with cleaner coordination between the mobile app and the backend. Gluchol is live on iOS and Android, and the client, who has worked with me on several projects, is already planning the next ones.