# 66: AI Habit Tracker & Streaks — Daily Audio Coach & Motivation > AI-powered habit tracker with daily audio coaching and personalized content. (iPhone/iPad app by Iqbal Hussain.) - Source: https://appshunter.io/ios/app/66-ai-habit-tracker-and-streaks/id6783880177 (this page in markdown: same URL + `.md`) - Developer: [Iqbal Hussain](https://appshunter.io/developer/1896288598) - Category: Lifestyle - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 21 MB - Languages: American English - Released: 2026-07-10 - Data updated: 2026-07-28 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/66-ai-habit-tracker-and-streaks/id6783880177/reviews.md ## What is 66? Most habits fail because the advice is wrong. You've been told it takes 21 days. That's a myth invented in the 1960s. Researchers at University College London studied real people forming real habits and found the true average is 66 days. Published in the European Journal of Social Psychology, the study tracked 96 participants over months and found that consistency, not intensity, is what makes a behavior automatic. 66 is built around that science. Every feature, every day, every session. WHAT MAKES 66 DIFFERENT Most habit trackers give you a checkbox. 66 gives you a full daily experience. Daily AI article Each morning, 66 generates a personalized article written specifically for your habit, your goals, and exactly where you are in your 66-day journey. No generic advice. Content that speaks to what you're building. Daily AI audio session A narrated audio session drops every day. Listen while you commute, work out, cook, or wind down. Your habit coach in your ears, every single day. AI chat coach Ask anything. The built-in coach answers questions, helps you work through setbacks, and keeps you motivated when the streak feels hard to maintain. Available 24 hours a day, always in context. Very few habit apps combine all three. PICK YOUR HABIT. COMMIT TO THE JOURNEY. Choose from 22 built-in habits across six categories: Mindfulness - meditation, breathing, journaling Fitness - daily movement, strength training, running Nutrition - eating habits, hydration, meal planning Productivity - deep work, digital detox, learning Sleep - wind-down routines, consistent sleep times Daily habits - gratitude, reading, cold showers, and more Or create a fully custom habit. 66 adapts to whatever you're building. Set your personal goal. Share how you're feeling. 66 tailors every article and audio session to you. TRACK EVERY DAY OF YOUR 66 Visual 66-day timeline showing your full journey Calendar view to check off every day you showed up Streak counter to keep the momentum going Unlockable badges to celebrate every milestone Daily reminders so you never miss your one habit THE SCIENCE IS CLEAR Missing one day does not break the habit. What breaks habits is inconsistency over time. 66 is designed to make showing up the easiest part of your day, so by day 66 the behavior feels automatic, not effortful. One habit. 66 days. Build it for life. 66 PRO 66 Pro unlocks daily AI articles, narrated audio sessions, the AI chat coach, and everything else 66 has to offer. Subscription options: Monthly: $9.99 6 months: $49.99 Yearly: $95.99 Payment is charged to your Apple ID account. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Download 66 free. Start your first habit today. Habit formation research: Lally, P. et al. (2010). How are habits formed: Modelling habit formation in the real world. European Journal of Social Psychology. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Key features - Personalized daily AI articles - Narrated daily audio sessions - AI chat coach for support - Visual 66-day timeline - Streak counter - Customizable habit creation - Daily reminders ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Monthly Subscription | $9.99 | per month | | Six Months Subscription | $39.99 | per 6 months | | Yearly Subscription | $59.99 | per year | ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/66-ai-habit-tracker-and-streaks/id6783880177/reviews.md ### 5/5 — Simple & fast. *2026-07-13* Smart AI coaching, beautiful design and super easy to use. ## Frequently asked questions about 66 ### What is the science behind 66? 66 is based on research from University College London, which found that the average time to form a habit is 66 days, not the commonly cited 21 days. The app emphasizes consistency over intensity to make behaviors automatic. ### What kind of habits can I track with 66? You can choose from 22 built-in habits across categories like Mindfulness, Fitness, Nutrition, Productivity, and Sleep. You can also create fully custom habits tailored to your specific goals. ### Does 66 have ads? No, 66 is ad-free. The app focuses on providing a seamless user experience without interruptions from advertisements. ### How does the AI chat coach in 66 work? The AI chat coach is available 24/7 to answer your questions, help you overcome challenges, and provide motivation. It stays in context with your habit-building journey. ### What are the subscription options for 66 Pro? 66 Pro offers monthly ($9.99), six-month ($49.99 with a 3-day free trial), and yearly ($95.99 with a 7-day free trial) subscription plans. These unlock all features, including AI articles, audio sessions, and the chat coach. ### Can I cancel my 66 Pro subscription? Yes, you can manage or cancel your subscription anytime in your App Store account settings. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. ### What devices is 66 available on? Currently, 66 is supported on iPhone. The app is designed to provide a consistent experience across Apple's mobile devices. ### How often is 66 updated? The app was last updated on July 14, 2026, indicating regular maintenance and potential feature additions. This suggests a commitment to improving the user experience and reliability. ## Version history (last 2 releases) ### 1.1 — 2026-07-14 Fixes and Improvements. ### 1.0 — 2026-07-10 No release notes. ## More apps by Iqbal Hussain - [Invoice Biz: Expense Tracker](https://appshunter.io/ios/app/invoice-biz-expense-tracker/id6766430208) All apps by Iqbal Hussain: https://appshunter.io/developer/1896288598 --- *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 2026-07-28.*