# GoodHabits: 66-Day Tracker — Habits in a 66-day arc

> Habits in a 66-day arc (iPhone/iPad app by Simon Bogutzky.)

- Source: https://appshunter.io/ios/app/goodhabits-66-day-tracker/id1594176244 (this page in markdown: same URL + `.md`)
- Developer: [Simon Bogutzky](https://appshunter.io/developer/1594176396)
- Category: Productivity, Health & Fitness
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 15 MB
- Languages: American English, German (Germany)
- Released: 2024-10-29
- Data updated: 2026-08-18
- User reviews in markdown: https://appshunter.io/ios/app/goodhabits-66-day-tracker/id1594176244/reviews.md

## What is GoodHabits?

One habit, one 66-day arc – calm, with no noise.

GoodHabits walks with you while you build a habit across a fixed arc of 66 logged days. The number comes from University College London research (Lally et al., 2010): there, the time until a new habit felt automatic was 66 days at the median – across a range of 18 to 254 days. So 66 is a reference point, not a finish line.

Why an arc instead of endless streaks:

- A manageable frame with a defined end, not a counter without a horizon
- A grace day: a missed day can be logged until the end of the following day
- Home Screen widgets – one glance is enough, and logging never opens the app
- Calm progress display that keeps your completed days visible

A good fit for:

- Morning routines and healthy habits
- Fitness and nutrition goals
- Productivity and work habits
- Mindfulness and self-care

No tracking, no analytics SDKs, no account: your data stays on your device.

If your habit still needs attention after 66 days, that is not failure – that is the spread the study actually reports.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Advanced Habit Tracking | $2.99 | one-time |



## Version history (last 5 releases)

### 3.0.2 — 2026-08-17

We made our description of the research more precise: 66 days is the median, and the range ran from 18 to 254 days. The FAQ, onboarding and milestone texts now say so.

### 3.0.1 — 2026-08-09

Bug fix: Purchases and redeemed codes now unlock premium features right away – including when they happen outside the app, such as on another device or after a Family Sharing approval. Previously, this required restarting the app.
Bug fix: Week navigation in the calendar now reliably jumps to the correct week around daylight saving time transitions.

### 3.0.0 — 2026-07-27

GoodHabits 3.0 is our biggest update yet:

• Fresh, native design — the habit list, onboarding, and every sheet now follow Apple's design language
• Interactive widgets — choose a habit and log today directly from your Home Screen
• Grace window — a missed day can still be logged until the end of the following day before your progress resets
• Reminders with a "Done" action — mark a habit complete right from the notification, even on Apple Watch
• Smoother completion — logging a day responds instantly, with calm, native animations
• Share your milestone — after 66 days, share your achievement card straight from the app
• Better accessibility — full Dynamic Type and VoiceOver support
• More privacy — we removed all analytics and tracking; your data stays on your device

### 2.1.0 — 2026-01-14

Now, you can easily customize reminders using the new settings sheet!

### 2.0.1 — 2025-09-15

iOS 26 Optimized - Enhanced performance and compatibility for the latest iOS version.

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## More apps by Simon Bogutzky

- [SnapTrack: Camera Scale Reader](https://appshunter.io/ios/app/snaptrack-camera-scale-reader/id6742512936)

All apps by Simon Bogutzky: https://appshunter.io/developer/1594176396

## Related topics

[good habits](https://appshunter.io/ios/topics/good-habits)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-18.*