Keepcue

Inspiration

We chose to build a reminder app after discussing all seven creator briefs. Most of our team has the same problem Sam Beckman talks about: reminders break when switching between iOS and Android. If a creator with that audience is talking about this issue, it means the market still lacks a good solution.

Rocky Road

At first the project looked easy. Designing the interface felt simple. We thought the main work would be UI and features. But once we started coding, we realized the real challenge was much deeper.

Mobile operating systems have strong background limits. Notifications are not guaranteed to fire exactly on time. Syncing in the background is restricted by the OS. These limitations are invisible to users, but they control what an app can actually do.

This slowed us down and forced us to rethink the architecture.

Instead of fighting the OS, we redesigned the system around its limits. We combined server sync, local scheduling, and recovery logic to make reminders as reliable as the platform allows. The goal was not perfect timing — which is impossible — but consistent behavior and cross-device trust.

One key lesson we learned is that reliability is about recovery. When delays happen, the app must never lose reminders. Snoozing updates sync instantly across devices, so users always see the same state.

Interestingly, the part we expected to be the most difficult — purchases and subscriptions — turned out to be the easiest. RevenueCat simplified the entire integration and guided us through every step. What we thought would be a major obstacle became one of the smoothest parts of the project.

Hidden Brilliant For Us

We implemented real monetization using RevenueCat. Purchases sync across platforms, so if a user buys on iOS and logs in on Android, premium access unlocks automatically. The business model follows the same cross-platform philosophy as the reminder system.