BeastInterval vs fast_burn
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BeastInterval
This interval timer app is designed for athletes and fitness enthusiasts to track HIIT workouts. It offers customizable routines, detailed progress tracking, and achievements to help users train smarter and stay consistent.
- 18 premade workout plans
- Customizable routines
- Detailed history and stats
- Achievements for consistency
- 7-day activity charts
- iCloud sync
Read full descriptionHide full description
Crush every interval. Train harder. Track everything. BeastInterval is your ultimate HIIT workout timer built for athletes, fighters, and anyone pushing their limits. From Tabata and EMOM to fully custom routines, BeastInterval delivers precision, performance, and progress tracking without distractions. Key Features: • 18 premade workout plans with customizable rounds (up to 20) • Custom programs with save option (up to 30 rounds, 5:59 active/rest phases) • Detailed history view with streaks and completion stats • Achievements for consistency and progress • 7-day activity charts and full workout history • iCloud sync for stats and workouts • No ads, no clutter — just focus Built for every athlete. Whether you’re training at the gym, at home, or on the mat, BeastInterval helps you stay consistent, push harder, and train smarter. Download now and unleash the beast.
fast_burn
Read full descriptionHide full description
Fasting made simple. FastBurn shows what's happening in your body as you fast - from fat burning to autophagy - so every hour feels like progress. FASTING TIMER One tap to start. A ring UI tracks your elapsed time and body phase: blood sugar rising, fat burning, ketosis, autophagy. PLANS THAT FIT YOU Your goal, body type, and experience determine the best protocol: - 16:8 (16h fast / 8h eat) - 18:6 (18h fast / 6h eat) - 20:4 (20h fast / 4h eat) - 36-hour extended fast WEIGHT TRACKING + APPLE HEALTH Log weight and view trends. Syncs automatically with Apple Health. STATS & CALENDAR Total fasts, average duration, best streak - all at a glance. Calendar view shows your daily history. SMART REMINDERS Customize alerts for fast start, phase changes, and eating windows. FREE FEATURES - 16:8 fasting timer - Fasting history & basic stats - Weight log PRO FEATURES - All fasting plans (18:6, 20:4, 36h) - Detailed body phase tracking - Full statistics & trend charts - Fasting calendar - Unlimited fasting history SUBSCRIPTION DETAILS FastBurn Pro is an auto-renewable subscription. - Annual plan: includes a 7-day free trial - Monthly plan - Payment is charged to your Apple ID at confirmation - Subscription auto-renews unless canceled at least 24 hours before the current period ends - Unused portion of a free trial is forfeited upon purchase - Manage or cancel: Settings > Apple ID > Subscriptions Terms of Use: https://fastburn-legal.vercel.app/terms.html
Screenshots
Verdict
The clearest difference is update cadence: fast_burn at every 8 days against BeastInterval'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. BeastInterval sells 5 in-app purchases, starting at $0.99 per 7 days and fast_burn sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
BeastInterval ships an update every 3 weeks, fast_burn every 8 days. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.
| Parameter | BeastInterval | fast_burn |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 3 weeks | Every 8 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone |
| Requires iOS | 17 | 17.0 |
| Further details — not scored | ||
| Size | 33 MB | 1 MB |
| Age rating | 4+ | 12+ |
| Developer | MefjuDev LLC | Keiichiro Hayashida |
In-app purchases
BeastInterval
- Weekly3 Days trial$0.997 Days
- Monthly3 Days trial$2.991 Month
- 3 Months$7.993 Months
Show 1 moreShow fewer
- Yearly$14.991 Year
- BeastInterval Pro$4.99
fast_burn
- FastBurn Pro (Monthly)$4.991 Month
- FastBurn Pro (Annual)7 Days trial$29.991 Year









