Second Nature vs Birch Fit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Second Nature
This app uses behavioral science to help you build healthy habits for long-term weight loss. It tracks sleep, exercise, and emotional regulation, offering personalized advice from a nutritionist and a library of recipes and educational articles.
- Behavioral science approach
- Personalized nutritionist support
- Holistic habit tracking (sleep, exercise, emotions)
- Healthy recipe library
- Daily educational articles
- Apple HealthKit integration
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Second Nature exists to change minds about losing weight. Our app uses behavioural science to retrain your mind to make healthy choices automatically, so these stick in the long run. But we don’t just look at what you’re eating and how much you weigh. We also look at your sleep patterns, exercise levels, how you regulate emotions, and other habits that impact the way you might be feeling. We also pair you with a registered nutritionist who provides one-to-one advice and supports you to build new, healthier habits. Our app also has hundreds of simple, indulgent recipes as well as daily articles that explain the science of healthy living - so you feel empowered to make changes, rather than just being told what to do. Britain’s NHS recommends us because their own research suggests we’re twice as effective as other weight-loss programmes. 90% of Trustpilot reviews rate us as ‘excellent’ because 9 out of 10 people lose weight and keep it off, even after 12 months. We want to make losing weight feel easier; to make it feel second nature. Download the app and sign up today to start your journey! Second Nature uses Apple HealthKit to integrate your phone's step data to help you set goals.
Birch Fit
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Take the guesswork out of weight loss with Birch Fit, the coaching app that keeps you accountable, supported and on track every single day. With Birch Fit, you’re never doing this alone. Your coach sees your progress in real time — your calorie balance, activity and weigh-ins and steps in with support the moment you need it. No more drifting off track before anyone notices. With the help of your coach, Birch Fit helps you stay consistent, confident and in control. Staying consistent has never been easier… • Know exactly how much to eat and burn each day • See your calorie balance and progress at a glance • Get reminders that keep you focused and consistent • Log workouts, meals and water intake in seconds • Track your body changes with side-by-side progress photos Every part of the app works together to keep you moving forward, so you always know where you stand and what to do next. ACCOUNTABILITY THAT WORKS When life gets busy, Birch Fit keeps you from slipping through the cracks. Real-time insights mean your coach knows when to step in with a message or video call, helping you reset before you fall behind. It’s not just another fitness tracker. It’s a system built for lasting results — where you’re seen, supported and set up to win.
Screenshots
Verdict
The clearest difference is update cadence: Second Nature at every 3 days against Birch Fit's every 3 weeks. On price, ads, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Second Nature ships an update every 3 days, Birch Fit every 3 weeks. The most recent releases landed on November 1, 2026 and October 5, 2026 respectively.
| Parameter | Second Nature | Birch Fit |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (57 ratings) — better | — |
| Positive reviews | 65.0% of reviews | — |
| Number of ratings | 57 — better | — |
| Update frequency | Every 3 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.4 | 15.6 — better |
| Further details — not scored | ||
| Size | 134 MB | 15 MB |
| Age rating | 17+ | 17+ |
| Developer | Second Nature Health Ltd | Daniel Birch |
In-app purchases
Second Nature
No in-app purchases
Birch Fit
No in-app purchases









