# BS vs Interval Flow

The clearest difference is review sentiment: BS at 92% against Interval Flow's 48%. BS also leads on in-app purchases (none vs 10) and iOS requirement (13.0 vs 18.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Interval Flow sells 10 in-app purchases, starting at $4.99 per 3 months. BS asks for nothing beyond the download.

BS ships an update every 2 weeks, Interval Flow fortnightly. The most recent releases landed on July 19, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | BS | Interval Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (168 ratings)](https://appshunter.io/ios/app/interval-flow-wod-timer/id6444124987/reviews)** |
| Number of ratings | — | **168** |
| Positive reviews | **91.7% of reviews** | 48.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Fortnightly** |
| Monetization | **Free** | Subscription |
| Size | 2 MB | 20 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Simon Plovyt](https://appshunter.io/developer/1492758789) | [Bence Kaposzta](https://appshunter.io/developer/1650069302) |

## What reviewers say

### BS

[App page](https://appshunter.io/ios/app/bs-free-interval-timer/id1492758790)

A straightforward workout timer designed for focus, offering customizable rounds, intervals, and start delays without any advertisements. Adjust sound effects to suit your training style for a distraction-free experience.

**Highlights:** Customizable number of rounds, Adjustable time per round, Configurable rest intervals, Pre-workout countdown, Adjustable sound effects, Ad-free experience

**In-app purchases:** none


### Interval Flow

[App page](https://appshunter.io/ios/app/interval-flow-wod-timer/id6444124987)

This app revolutionizes fitness routines with deep customization and advanced tracking for various activities like HIIT, Yoga, and CrossFit. It allows users to create, share, and follow personalized workouts with features like color-coded intervals, real-time progress tracking, and voice assistance.

**Highlights:** Color-coded intervals, Customizable circuits, Real-time progress tracking, Voice assist and search, Exercise library, Workout sharing

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 Month | $4.99 | per 3 months |
| 1 Month | $9.99 | per month |
| 1 Month, 3 day trial | $9.99 | per month |
| Annual | $14.99 | per year |
| 1 Year discounted | $25.95 | per year |
| 1 Year, 3 day trial | $39.99 | per year |
| 1 Year | $39.99 | per year |
| 1 Year Intro month | $39.99 | per year |
| Free Lifetime subscription | Free | one-time |
| Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is BS free?

BS is free to download, with no in-app purchases.

### Is Interval Flow free?

Interval Flow is free to download, with in-app purchases available.

### Do BS or Interval Flow have ads?

Neither BS nor Interval Flow shows ads.

### Which is updated more often, BS or Interval Flow?

BS ships an update every 2 weeks, and Interval Flow fortnightly. Most recently, BS was updated on July 19, 2026 and Interval Flow on September 5, 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.*