Mobile app data storage relies on clever, unseen tech
A developer diary from the Coachy strength-training app shows how event sourcing solves the hardest problem in mobile data sync and why it matters for every workflow tool on your phone.
The Problem With Overwriting History Every time you edit a strength-training session in a traditional app, something disappears. The weight you lifted three weeks ago gets overwritten. The rest interval between sets dissolves. The progression of an exercise over months becomes a ghost traceable only through complex database queries or export workarounds that most users never attempt. This is not a niche frustration. It is the fundamental limitation of CRUD-based data architecture, and it becomes especially acute...
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