Simply Fast vs breatheX Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Simply Fast
This minimalist app helps you achieve time-restricted fasting goals with a simple, intuitive interface. Configure fasting start times and durations, and receive timely notifications for your fasting and eating windows. No account or sign-in is required.
- Simple and easy-to-use design
- Customizable fasting start times
- Adjustable fasting durations (12-23 hours)
- Fasting and eating window notifications
- No sign-in or account required
- Privacy-focused, no data collection
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Simply Fast is a beautifully simple, no-frills companion for time-restricted eating. Rebuilt from the ground up for the latest iPhone and Apple Watch, it keeps the same clean, one-glance design while feeling right at home on today's devices. Set your window, glance at your progress, and get on with your day. [Features] • Clean, distraction-free design for iPhone and Apple Watch. • Set your fasting start time to any half hour of the day. • Choose a fasting duration from 12 to 23 hours. • A live progress bar shows your current fasting or eating window, with the time remaining at a glance. • Apple Watch complications for modern watch faces, so your window is always one look away. • A notification at the start of each fasting and eating window. • Your schedule stays in sync across iPhone and Apple Watch. • No sign-in, no account, no ads, and no pop-ups. • Private by design: the app collects nothing and sends us no information. [Important] You should consult your doctor before starting or changing a fasting schedule. Simply Fast supports time-restricted eating only, not full-day fasting such as 5:2, and it does not track or store a history of your fasts. [Feedback] We would love to hear from you. Please reach us through the app support page (https://www.mpathy.tech/contact-us). If you find Simply Fast useful, please tell a friend and leave a rating on the App Store. Your support keeps the app going.
breatheX Pro
This app offers a flexible tool for guided breathing exercises. Create custom routines or choose from pre-made patterns, with options for sound and haptic feedback. Track your progress and integrate with health apps.
- Dozens of pre-made breathing routines
- Create custom multi-step routines
- Adjustable sound and haptic feedback
- Track results over time
- Integrate with Apple Health
- Watch Companion App for practice and data sync
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The breatheX Pro App is a powerful, easy-to-use, and highly flexible breath eXercise tool. It allows an individual to chose from dozens of pre-made breathing patterns/routines or edit/ create their own custom multi-step routines. Users can set practice preferences including sounds and or haptics. The App also provides a variety of tools to measure and track results over time and allows users to integrate with Apple Health App to track practice sessions as Mindfulness minutes. BreatheX Pro also includes a Watch Companion App that automatically syncs with the iPhone so the user can access and practice using all the latest routines and then send practice logs (including heart rate data) back to the iPhone for review and tracking.
Screenshots
Verdict
The clearest difference is update cadence: breatheX Pro at weekly against Simply Fast's every 2 months. breatheX Pro also leads on rating (4.9 vs 4.5) and ratings volume (13 vs 2). Simply Fast's advantage is price ($0.99 vs $4.99). On review sentiment, ads, in-app purchases and monetization model 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
Simply Fast costs $0.99 and breatheX Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
breatheX Pro holds the better App Store score, 4.9 against 4.5. That said, the two scores are not equally well evidenced: breatheX Pro has 13 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
Simply Fast ships an update every 2 months, breatheX Pro weekly. The most recent releases landed on September 22, 2026 and September 6, 2026 respectively.
| Parameter | Simply Fast | breatheX Pro |
|---|---|---|
| Price | $0.99 — better | $4.99 |
| Rating | 4.5 (2 ratings) | 4.9 (13 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 2 | 13 — better |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, Apple Watch | iPhone, iPad, iPod, Mac, Apple Watch — better |
| Requires iOS | 18.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 82 MB |
| Age rating | 4+ | 4+ |
| Developer | Mpathy Tech | PEAKX LLC |
Customer experience
Simply Fast
breatheX Pro
In-app purchases
Simply Fast
No in-app purchases
breatheX Pro
No in-app purchases









