Comparison

BeastInterval vs fast_burn

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 18 premade workout plans
  • Customizable routines
  • Detailed history and stats
  • Achievements for consistency
  • 7-day activity charts
  • iCloud sync
Read 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.

About

fast_burn

Features
Read 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

BeastInterval4 screens
fast_burn4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard1 real difference · 9 level
BeastInterval versus fast_burn: the parameters behind the verdict, then further details
ParameterBeastIntervalfast_burn
PriceFreeFree
Rating4.8 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 3 weeksEvery 8 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone
Requires iOS1717.0
Further details — not scored
Size33 MB1 MB
Age rating4+12+
DeveloperMefjuDev LLCKeiichiro Hayashida

In-app purchases

5 purchases

BeastInterval

Subscriptions4
  • Weekly3 Days trial$0.997 Days
  • Monthly3 Days trial$2.991 Month
  • 3 Months$7.993 Months
Show 1 more
  • Yearly$14.991 Year
One-time1
  • BeastInterval Pro$4.99
2 purchases

fast_burn

Subscriptions2
  • FastBurn Pro (Monthly)$4.991 Month
  • FastBurn Pro (Annual)7 Days trial$29.991 Year

Questions

Is BeastInterval free?
BeastInterval is free to download, with in-app purchases available.
Is fast_burn free?
fast_burn is free to download, with in-app purchases available.
Do BeastInterval or fast_burn have ads?
Neither BeastInterval nor fast_burn shows ads.
Which is updated more often, BeastInterval or fast_burn?
BeastInterval ships an update every 3 weeks, and fast_burn every 8 days. Most recently, BeastInterval was updated on October 24, 2026 and fast_burn on October 6, 2026.

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