Reboryn vs Stack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Reboryn
This app helps you improve flexibility and reduce stiffness with structured mobility sessions and daily routines. It offers video guidance, a comprehensive exercise library, and community features to keep you motivated and accountable.
- Regular mobility sessions
- Community and accountability features
- Daily 15-minute routines
- Health app integration
- Dynamic video guidance
- Comprehensive exercise library
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Reboryn: Unlock Your Stiff Body! Transform your body, improve flexibility, and rediscover freedom of movement with Reboryn—the ultimate mobility app designed to help you move, feel, and perform better. Whether you're a beginner, a busy professional, or a seasoned athlete, Reboryn equips you with tools and routines to achieve your goals. Key Features: • Regular Mobility Sessions Stay motivated with structured sessions tailored to specific goals like posture, tight hips, or flexibility. • Community & Accountability Join a supportive community of like-minded individuals. Track your streaks and engage with leaderboards to stay consistent and accountable. • Daily 15-Minute Routines Short on time? Our quick routines fit into any schedule while delivering real results. • Health App Integration Sync with the Health app to track your mobility minutes and progress seamlessly. • Dynamic Video Guidance Follow step-by-step video instructions from mobility experts with clear form cues and modifications. • Comprehensive Exercise Library Explore a wide range of effective exercises for hamstrings, hips, shoulders, ankles, and more. Why Choose Reboryn? • Routines for all levels, from beginners to advanced users. • Proven methods to improve flexibility and reduce stiffness. • Consistent updates with fresh routines and structured sessions to keep you progressing. • Built-in tools for community support and accountability to help you stay on track. Rediscover your freedom of movement. Download Reboryn today!
Stack
This app helps you build and complete habits within a 90-day timeframe. It focuses on finishing cycles rather than perpetual tracking, with a limit of three habits at a time. The interface uses a grid to mark progress, and a widget provides quick access to daily tasks.
- Three habit limit
- 90-day completion cycles
- Manual grid progress tracking
- Home-screen widget
- One honest skip per week
- No accounts or data collection
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Stack is a habit tracker with a finish line. Three habits. Ninety days. Then it is done. The stack ships, archives, and you start fresh. The cap of three and the ninety days are not limits to pay past. They are the point. Most habit apps are built to keep you forever. Stack is built to end. - Three habits. No more. The limit is the feature. - Ninety days. A clean quarter, then a finish line. - One honest skip a week. It holds your streak but shows as a skip, never a fake fill. - The grid is the app. Ninety days of dots, filled in by hand. - A home-screen widget with today's three. Tap to mark. - Built in Liquid Glass for iOS 26. No accounts. No subscription. No analytics. Zero data collected. Pay once. It is yours. From hsla0001, an independent studio in New York. Void captures. Loop times. Protocol scores the room. Stack holds intent.
Screenshots
Verdict
The clearest difference is price: Reboryn at Free against Stack's $6.99. Reboryn also leads on ratings volume (9 vs 1) and device support (3 vs 1). Stack's advantage is rating (5.0 vs 1.9) and update cadence (daily vs every 3 weeks). On ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Reboryn is free to download; Stack costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Stack holds the better App Store score, 5.0 against 1.9. That said, the two scores are not equally well evidenced: Reboryn has 9 ratings behind it against 1, so its average is the more settled of the two.
Reboryn ships an update every 3 weeks, Stack daily. The most recent releases landed on October 10, 2026 and October 14, 2026 respectively.
| Parameter | Reboryn | Stack |
|---|---|---|
| Price | Free — better | $6.99 |
| Rating | 1.9 (9 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 9 — better | 1 |
| Update frequency | Every 3 weeks | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 365 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | A.C.N. 668 709 457 PTY LTD. | hsla0001 |
Customer experience
Reboryn
Stack
In-app purchases
Reboryn
No in-app purchases
Stack
No in-app purchases









