I Built an Android App With Zero Backend — Here's What Happened

I Built an Android App With Zero Backend — Here's What Happened



Tópico: I Built an Android App With Zero Backend — Here's What Happened
Categoria: Tutoriais | Programação & Tecnologia
Idioma Principal: Português (Conteúdo de Tecnologia)

Descrição do Conteúdo / Informações:
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I got tired of apps trying to monetize my attention.

Notifications, ads, endless feeds — it never stops.

So I decided to build an Android app with zero backend.

I'm a Japanese developer, and English isn't my first language, so I used AI to help write this article.

How many productivity apps have you downloaded, only to be greeted by a mandatory registration screen, bloated interface, pop-up ads, or a constant push for a premium cloud subscription?

Something felt missing from every app I tried.

I wanted the simplicity of a paper notebook combined with the convenience of a smartphone — a tool where my thoughts and tasks stay private, on my own device, without constant distraction.

So I built ZEROLOG — a fully offline, minimalist daily planner for Android.

In this article, I'll share:

The design philosophy

The tech stack

The challenges of building a 100% offline app

And how I passed Google Play's 20-tester requirement

The Philosophy: "Analog-Inspired" Digital Minimalism

ZEROLOG is inspired by pen-and-paper planning.

No loading

No accounts

No tracking

No notifications

Just open the app, write your day, and move on.

The Tech Stack

React 19

Vite 7

Tailwind CSS v4

Capacitor 8

Why Capacitor?

Capacitor lets me build with React while still accessing native features like:

Haptics (vibration feedback)

Local filesystem

Native notifications

Building a 100% Offline App

• Local-Only Data Storage
All data is stored on-device using Capacitor's filesystem API.
No server
No sync
No tracking
State is managed in React and saved asynchronously.

• Backup Without Cloud
Since there's no cloud, I built an export/import system.
Users can:
Export data as a .json file
Save it anywhere (PC, Drive, etc.)
Restore it anytime
You fully own your data.

• Habit Tracking & Vision
Simple habit tracking with visual consistency
Long-term planning with yearly + 3-month goals
No pressure. Just visibility.

• Haptics & Localization
Subtle vibration when checking tasks
Supports:
English
Japanese
Spanish
Monthly Overview
A simple calendar view:
Shows daily activity
No clutter
No over-engineering
The Hard Part: Google Play Testing
To publish, I had to pass:
20 testers
14 consecutive days
As a solo developer, this was tough.
What worked:
Indie communities (Reddit, X, Discord)
Test swaps
Keeping the app simple (no signup = easy to test)
Business Model
One-time purchase: $1.99
No ads
No subscriptions
No data collection
Wrap Up
Not every app needs the cloud.
ZEROLOG is:
Fast
Private
Distraction-free
If you're curious about offline-first apps or want a calmer planner, try it:
👉 https://play.google.com/store/apps/details?id=com.masajiworks.zerolog
💬 Have you built an offline-first app? Let me know in the comments!