Habit Architect
An Atomic-Habits-inspired iOS app that turns behavior science into a daily habit loop.
Habit Architect is a native SwiftUI + SwiftData iOS app for building good habits and breaking bad ones, built around the actual framework from James Clear's Atomic Habits. Instead of a checklist with a streak counter, it implements the four laws of behavior change, a dedicated habit-breaking flow, identity tracking, and real analytics — as five connected tabs on one shared data model.
A habit tracker built on the actual four laws of behavior change
Habit Architect organizes the entire app around five tabs — Today, Habits, Break, Identity, and Settings — backed by SwiftData models for Habit, Completion, BadHabit, Slip, TemptationLog, UrgeLog, Identity, and HabitContract. On top of that data model sits a full Four Laws toolkit (environment checklist, friction calculator, two-minute rule generator, habit reframing, milestone celebrations), an Insights dashboard (calendar heat map, progress graphs, streak summaries), and an Analytics suite (habit audits, plateau visualization, weekly/monthly reports) — turning a well-known book into an actual, working product.
Most habit trackers only track — they don't change behavior
Typical habit apps are a checklist with a streak counter: they motivate for a week and then get deleted. They rarely help someone apply the actual psychology of habit formation — cue, craving, response, reward — and they treat "breaking a bad habit" as an afterthought, if it exists at all, instead of a first-class flow with its own tools.
- Streak-counter apps motivate for a week, then get deleted
- "Breaking" a habit is usually missing entirely, or bolted on as a negative checkbox
- Behavior-change concepts (two-minute rule, friction, identity) rarely make it from the book into the app
- Users want visibility — heat maps, reports, trends — but most trackers only show today
Every tool from the book, built as an actual feature
I modeled the entire domain in SwiftData — habits, completions, bad habits, slips, temptations, urges, identities, and contracts — then built five tabs on top of it: Today for the daily habit loop, Habits for management, Break for quitting bad habits with the inverted four laws, Identity for the "votes" a completion casts toward who you're becoming, and Settings for theming, notifications, backup, and app lock. Every concept from the book — environment design, friction, the two-minute rule, identity-based habits — became its own SwiftUI view instead of a single generic "tips" screen.
A genuinely complete behavior-change toolkit
- Today tab with habit cards, one-tap complete/undo, and streak milestone celebrations
- Break tab for bad habits — inverted four laws, days-clean tracking, temptation and urge logging, slip recording
- Identity tab that turns completions into "votes" for the person you're trying to become
- Four Laws toolkit — environment checklist, friction calculator, two-minute rule generator, and habit reframing, straight out of the book
- Insights dashboard with a calendar heat map, progress graphs, and streak summaries
- Analytics suite — habit audits, plateau visualization, and weekly/monthly reports
- Accountability partners, community challenges, and shareable habit contracts
- Face ID app lock, CSV data backup/restore, and full theme (system/light/dark) support
From a book's framework to a shipped SwiftUI app
- 01
Translating the book into a data model
Modeled Habit, Completion, BadHabit, Slip, TemptationLog, UrgeLog, Identity, and HabitContract in SwiftData so every screen reads from a real, persisted graph instead of mocked state.
- 02
Core loop first
Built the Today tab and the streak manager before anything else, so the app was genuinely useful the moment it launched.
- 03
Breaking habits as a first-class flow
Designed the Break tab around the inverted four laws — make it invisible, unattractive, difficult, unsatisfying — with its own detail view, friction builder, and temptation/urge logging.
- 04
Four Laws toolkit
Built each concept from the book — environment checklist, friction calculator, two-minute rule, reframing, milestone celebration — as its own SwiftUI view rather than one generic tips screen.
- 05
Insights & analytics
Added a calendar heat map, progress graphs, streak summaries, plateau visualization, and weekly/monthly reports so users can see patterns, not just today.
- 06
Polish & QA
Added Face ID app lock, CSV export/import, theming, and notification preferences, then wrote a unit-test suite (DataImportService, StreakManager, DaysCleanCalculator, ThemePreferences) and a UI-test suite ahead of a TestFlight beta.
A modern, on-device native stack
Habit Architect is built natively on Android using a focused, modern stack chosen for performance, maintainability, and a clean user experience.
The decisions that shaped the product
Making "breaking a habit" feel as complete as "building one"
Gave bad habits their own models — Slip, TemptationLog, UrgeLog — and a dedicated days-clean calculator, instead of just inverting the same habit checkbox used for building good ones.
Turning behavior-change theory into tappable UI
Each of the four laws became its own tool — friction calculator, two-minute rule generator, environment checklist — so the psychology isn't just explained in a paragraph, it's something the user actually uses.
Keeping data trustworthy across import/export
Built DataImportService and DataExportService around CSV round-tripping and unit-tested the parser directly — empty file, header-only, valid row, export roundtrip — since a broken import would mean lost streaks.
On-device privacy without giving up features
Accountability partners, community challenges, and sharing all had to work with data stored only on-device and no required account, which shaped the sharing and partner-store design from the very start.
Why this project matters
Habit Architect shows what it looks like to take a well-known framework seriously instead of skimming it for a feature list: a real SwiftData model, a dedicated habit-breaking flow, an identity system, and genuine analytics, all shipped as a polished native iOS app with Face ID, theming, and CSV backup. It's proof I can turn a conceptual framework into a coherent, tested, ship-ready product — not just a UI wrapped around a single database table.
Have a mobile product idea?
I'm available for client work in Android, mobile product development, and end-to-end app delivery. Let's talk about what you're building.