Original Summary

Hey r/SideProject ! I’m a data scientist by day, and a few months ago I started building up an emergency food stockpile at home (family of 4). I quickly hit a problem: spreadsheets don’t tell you the one thing that matters, “if something goes wrong, how many days can we actually last?” So I built PrepBox , an Android app that: Calculates days of autonomy (calories in stock ÷ your family’s daily need), and shows which food or category is your bottleneck Tracks water as a parallel resource , with rotation intervals per storage type Alerts you before items expire (D-7/D-3/D-1) so you rotate stock instead of throwing it away Works as a normal pantry tracker too, with a built-in nutrition database (TACO, from a Brazilian university) Generates QR codes per shelf, supports CSV import/export and encrypted local backups The part I cared about most: privacy. The app has zero network permissions and zero storage permissions. Your inventory never leaves your phone. It felt wrong for an emergency app to depend on the internet. Stack: Kotlin, Jetpack Compose (Material 3), Room, Hilt, WorkManager. MVVM + Repository. Pricing: 30-day free trial, then a one-time purchase for PRO (no subscription). It’s live on the Play Store: [link] I’d really love feedback on: The onboarding: is it clear in the first 2 minutes what the app does? Whether the “days of autonomy” number feels trustworthy, or if you’d want to see how it’s calculated Anything that feels missing or overcomplicated Happy to answer questions about the architecture or the nutrition math. Thanks for reading! And if you wanna check the app: https://play.google.com/store/apps/details?id=com.stelladata.preppo   submitted by   /u/Emergency_Pear_9153 [link]   [comments]

  • 情报分类：商业与市场研究
  • 分类依据：内容涉及商业、投资或市场动态
  • 信息来源：Reddit · SideProject
  • 发布时间：2026/10/20 01:55:09