16 vs Mantis
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
16
This app helps users adopt intermittent fasting by tracking fasting periods, weight changes, and daily water intake. It integrates with Apple Health to import exercise data, providing insights into daily activity alongside dietary progress.
- Fasting tracking
- Weight tracking
- Water intake tracking
- HealthKit integration
- Fasting progress visualization
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Now more and more people are trying the new dietary method of intermittent fasting. As a dietary method, intermittent fasting has rapidly become popular worldwide in recent years, attracting a large number of people to try it. This dietary pattern is not only considered an effective weight loss method, but also believed to bring benefits to physical and mental health. What is intermittent fasting? Intermittent fasting is a dietary pattern that cycles between fasting and a normal diet. It doesn't specify which foods you should eat, but when you should eat them. Intermittent fasting does not involve tracking calories. This dietary approach is mainly achieved by limiting the daily eating time, rather than by accurately calculating the amount of calories or protein, fat, and carbohydrates consumed. HealthKit: We import your exercise data from Apple Health to help you understand your daily exercise routine. The intermittent fasting app will provide you with: Fasting Tracking: Intermittent fasting is tracked according to your fasting plan, and you can check your fasting progress at any time to see which stage of intermittent fasting your body is currently in. Weight Tracking: Record the trend of weight changes through daily weight check ins. Drinking water tracking: Set daily drinking water goals and track completion status. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Mantis
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Mantis is the workout app where you never count. Put your iPhone in front of you: the camera recognizes the exercise and counts every rep. Your only job is to move. JUST TRAIN. WE COUNT. • Camera rep counter for push-ups, squats, pull-ups, burpees, jumping jacks and more • Plank timer that starts on its own as soon as you hold the position • Only full reps count — partial reps are shown separately, so your numbers stay honest • Free mode: do exercises in any order, Mantis figures out what you're doing • Sets mode: rep goals, number of sets and a rest timer • Voice coach that guides the workout and counts out loud • Technique videos before exercises you haven't done yet • On iPhone models with LiDAR, movement is tracked in 3D for even better accuracy SHORT, NO EXCUSES A 4-minute warm-up, a home workout or a street workout on the bar and dips. 15 exercises, most of them bodyweight. No gym needed — just your phone and a bit of floor. PROGRESS YOU CAN SEE • Workout report: reps, time, pace and intensity rating • Charts for the week, the month and all time • Day streak and weekly goal • Home Screen widget — the mantis reminds you when your streak is at risk TRAIN WITH FRIENDS • A feed of your friends' workouts with likes and comments • Teams of up to 8: points for every workout and weekly quests • A new season every month with a team leaderboard and podium places • 11 achievements, from Rookie to Titan YOUR WORKOUT RECEIPT Share your result to Instagram Stories, TikTok or Telegram as a stylish receipt or a polaroid. Mantis takes photos while you train — just pick the best one. APPLE WATCH On Apple Watch: your streak, weekly goal and latest workout, and the streak flame on your watch face. Heart rate from the watch during a workout, on screen and in the summary. Pause right from the watch. APPLE HEALTH Workouts are saved to Apple Health and close your Activity rings on iPhone and Apple Watch. Calories are estimated from your weight. PRIVACY Movement is recognized right on your iPhone. Video is never recorded or uploaded. Heart rate from the watch stays on your devices. Only the photos you choose appear in the feed. Your profile can be private. Mantis is free — no subscriptions and no ads. Put your phone down. Start with a short one.
Screenshots
Verdict
The clearest difference is in-app purchases: Mantis at none against 16's 3. Mantis also leads on update cadence (every 3 days vs every 9 days). 16's advantage is iOS requirement (15.0 vs 17.0). On price, ads 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. 16 sells 3 in-app purchases, starting at $1.99 per month. Mantis asks for nothing beyond the download.
16 ships an update every 9 days, Mantis every 3 days. Both last shipped on October 24, 2026.
| Parameter | 16 | Mantis |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (54 ratings) — better | — |
| Positive reviews | 77.8% of reviews | — |
| Number of ratings | 54 — better | — |
| Update frequency | Every 9 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 28 MB |
| Age rating | 4+ | 12+ |
| Developer | Heze Refresh Network Technology Co., Ltd | Mikhail Kurbatov |
In-app purchases
16
- Pro (Monthly)$1.991 Month
- Pro (Yearly)$8.991 Year
- Pro (Lifetime)$17.99
Mantis
No in-app purchases








