One developer built an offline emergency guide app for their family
A solo developer made an app that works without internet to help families know what to do during emergencies. The idea came from realizing their own family had no real plan if cell signal dropped. The app stores emergency info directly on the phone.
The developer noticed that during disasters or power outages — when phone networks often fail — most families have no clear plan. So they built an app that stores evacuation routes, emergency contacts, and first-aid steps on the device itself, so it works even with no signal.
This is a classic solo side project: solving a personal problem and turning it into a product others might need too. The offline-first approach is a genuine differentiator for emergency apps, since the situations they're designed for are exactly when internet access is unreliable. However, no concrete numbers around downloads, pricing, or revenue have been shared publicly.
Key points
- App works fully offline — no internet needed during emergencies
- Inspired by a personal realization that the developer's own family had no emergency plan
- Includes evacuation routes, emergency contacts, and first-aid guidance
- Follows the classic 'scratch your own itch' solo developer path
- No public data yet on downloads, pricing, or revenue
Quick term guide
- app stores
- Official places like Apple’s App Store and Google Play where people download mobile apps.
- SAST
- A security testing method that reads source code directly without running the program
- outage
- When an online service stops working temporarily and users cannot access it.
- side project
- A small project someone builds outside their main job or main business.
- offline-first
- Designed to work well even when you do not have an internet connection.
- diff
- A view that shows exactly what changed in the code.
- share
- A server folder made available to apps or other devices.
- scratch your own itch
- A startup approach where you build a product to solve a problem you personally experience.