Centsaday - Book Summary Android iOS App
Daxesh V
Centsaday is a modern book summary app inspired by the popular Headway app. The client wanted a smooth, minimal, and highly engaging reading experience that works perfectly on both Android and iOS. I handled the complete end-to-end development, including frontend, backend, analytics, and subscription systems.
🎯 Project Goal
The goal was to build a cross-platform app that allows users to read and listen to bite-sized book summaries, discover new content, save favorites, and upgrade to premium through a clean and intuitive UI—very similar to Headway, but tailored to the client’s content library and brand identity.
🧩 My Responsibilities
I worked as the solo developer, taking full responsibility for:
Architecture design (clean, scalable structure)
App UI and feature development
Integration with subscriptions (Superwall / RevenueCat)
Firebase backend setup
Analytics and conversion tracking
App store deployment
Ongoing improvements and optimizations
🚀 Key Features I Built
📚 Engaging Book Summary Library
Category-based browsing
Search and quick filters
Featured and trending books
Clean card-based UI inspired by Headway
📖 Reader Experience
Beautiful, distraction-free reading screen
Adjustable font sizes
Clean typography, spacing, and readability
Dark mode support
🎧 Audio Summaries
Background audio playback
Play/pause, seek, skip
Remembers last listened position
🔐 Premium Subscription Flow
Integrated Superwall / RevenueCat for paywall and subscriptions
Monthly, yearly, and lifetime plans
Paywall A/B testing support
Handles cancellations and restore purchases
❤️ Favorites & Progress Sync
Save favorite summaries
Sync across devices using Firebase Auth
Track user reading/listening activity
⚡ Smooth Performance
Fast load times using Firestore
Caching for recently opened books
Lazy loading for images and summaries
☁️ Backend & Infrastructure
🔥 Firebase Setup
Firestore database for book summaries
Firebase Storage for images and audio
Firebase Auth for user login
Security rules to protect data
Cloud Functions for admin tools and content processing
📊 Analytics & Attribution
Integrated:
Firebase Analytics
Appsflyer
Mixpanel
These track:
onboarding funnels
paywall impressions
subscription conversion events
user retention metrics
UI / UX Approach
The UI was inspired by Headway:
Rounded, modern cards
Clean typography
Simple navigation
Smooth transitions
Micro-interactions (pulse, fade-in)
The client wanted an experience that looks premium, feels light, and encourages reading.
Results & Impact
The app achieved a smooth reading and audio experience across both platforms
Subscription flow significantly improved user conversion
Firebase reduced server costs and simplified content updates
The clean UI improved user retention and engagement
The client can add new summaries without releasing app updates
Client Feedback
The client appreciated the quality of the UI, the reliability of the subscription system, and the overall stability of the app. Most importantly, Centsaday delivered the premium reading experience they were aiming for—very close to the feel of Headway, but built fully custom from scratch.
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Posted Jun 2, 2025
Developed Centsaday, a cross-platform book summary app with audio, subscriptions, Firebase backend, analytics, and a smooth reading experience.
