HeartCalc vs Mindful Sound Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HeartCalc
Calculate your optimal heart rate training zones using 8 proven formulas. Get personalized zone recommendations for warm-up, fat burn, aerobic, anaerobic, and VO₂ max activities. Train smarter with science-backed insights for maximum fitness results.
- 8 proven heart rate formulas
- Personalized training zones
- Instant calculations
- Detailed explanations
- Automatic data saving
- Clean interface
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Transform Your Training with Precision Heart Rate Zones! Unlock your fitness potential with the most comprehensive heart rate calculator on the App Store. Whether you're a weekend warrior or elite athlete, discover your optimal training intensity for maximum results. 8 PROVEN FORMULAS - Sally Edwards & Winfried Spanaus - Classic Fox & Haskell formula - Modern Tanaka & Gellish methods - Latest Nes research (2013) - Gender-specific Gulati & Miller formulas COMPLETE TRAINING ZONES Get personalized heart rate zones instantly: - Warm-up Zone (50-60%) - Recovery & preparation - Fat Burn Zone (60-70%) - Optimal fat burning - Aerobic Zone (70-80%) - Endurance building - Anaerobic Zone (80-90%) - Performance improvement - VO₂ Max Zone (90-100%) - Peak athletic performance KEY FEATURES - Clean, modern interface following Apple design guidelines - Instant calculations with detailed explanations - Automatic data saving - your age and weight remembered - Multiple language support - No ads, no subscriptions, no data collection PERFECT FOR - Runners preparing for marathons - Cyclists optimizing training rides - Gym enthusiasts maximizing workouts - Personal trainers guiding clients - Anyone serious about fitness results Stop guessing your training intensity. Start training smarter with science-backed heart rate zones that deliver real results!
Mindful Sound Timer
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Mindful Sound Timer helps you return to the present moment throughout your day with gentle audio reminders. Choose from a curated selection of calming sounds and let the app periodically play them in the background — a simple way to pause, breathe, and be mindful. Features: • Choose from a variety of relaxing sound effects • Set how often and how many times the sound repeats • Runs in the background so reminders happen naturally • Gentle cues to bring awareness back to the present moment Whether you’re working, studying, or simply going about your day, Mindful Sound Timer helps you stay grounded and mindful with effortless reminders.
Screenshots
Verdict
The clearest difference is price: Mindful Sound Timer at Free against HeartCalc's $0.49. HeartCalc's advantage is iOS requirement (16.6 vs 18.5). On update cadence, 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
Mindful Sound Timer is free to download; HeartCalc costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.
HeartCalc ships an update every 2 months, Mindful Sound Timer every 3 months. The most recent releases landed on September 9, 2026 and May 18, 2026 respectively.
| Parameter | HeartCalc | Mindful Sound Timer |
|---|---|---|
| Price | $0.49 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.6 — better | 18.5 |
| Further details — not scored | ||
| Size | 1 MB | 8 MB |
| Age rating | 12+ | 4+ |
| Developer | Florian Schimanke | Conner Tate |
In-app purchases
HeartCalc
No in-app purchases
Mindful Sound Timer
No in-app purchases
