# BeastInterval vs fast_burn

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.

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.

## The numbers

| Metric | BeastInterval | fast_burn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/beastinterval-interval-timer/id6744288215/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | Free with in-app purchases | — |
| Size | 33 MB | 1 MB |
| Requires iOS | 17 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [MefjuDev LLC](https://appshunter.io/developer/1777787735) | [Keiichiro Hayashida](https://appshunter.io/developer/1622333497) |

## What reviewers say

### BeastInterval

[App page](https://appshunter.io/ios/app/beastinterval-interval-timer/id6744288215)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $0.99 | per 7 days |
| Monthly | $2.99 | per month |
| 3 Months | $7.99 | per 3 months |
| Yearly | $14.99 | per year |
| BeastInterval Pro | $4.99 | one-time |


### fast_burn

[App page](https://appshunter.io/ios/app/fast-burn/id6768056154)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FastBurn Pro (Monthly) | $4.99 | per month |
| FastBurn Pro (Annual) | $29.99 | per year |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*