# btwb vs Interval Flow

The clearest difference is in-app purchases: btwb at none against Interval Flow's 10. btwb also leads on ratings volume (1.5K vs 168) and iOS requirement (15.6 vs 18.6). On price, rating, review sentiment and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.6 for btwb against 4.7 for Interval Flow. That said, the two scores are not equally well evidenced: btwb has 1.5K ratings behind it against 168, so its average is the more settled of the two. Written reviews are what separate them: 53% of btwb's written reviews are positive against 48% of Interval Flow's.

btwb ships an update weekly, Interval Flow fortnightly. The most recent releases landed on September 22, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | btwb | Interval Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (1.5K ratings)](https://appshunter.io/ios/app/btwb-wod-tracking/id583688662/reviews) | **[4.7 (168 ratings)](https://appshunter.io/ios/app/interval-flow-wod-timer/id6444124987/reviews)** |
| Number of ratings | **1.5K** | 168 |
| Positive reviews | **53.2% of reviews** | 48.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 265 MB | 20 MB |
| Requires iOS | **15.6** | 18.6 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BTWB, LLC](https://appshunter.io/developer/583688665) | [Bence Kaposzta](https://appshunter.io/developer/1650069302) |

## What reviewers say

### btwb

[App page](https://appshunter.io/ios/app/btwb-wod-tracking/id583688662)

Log your workouts, discover new ones, and connect with your fitness community. Track progress, analyze performance, and manage nutrition with a comprehensive fitness tracking tool.

**Highlights:** Daily workout programming, Discover millions of WODs, Track workout results, Macro and nutrition tracking, Community and social features, Performance analysis and badges, Gym virtual programming

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Great app for tracking workouts
- 👍 Comprehensive fitness tracking features
- 🔥 Best CrossFit app on the market
- 💪 Helps identify strengths and weaknesses
- 🏆 Excellent for measuring progress over time

**What reviewers complain about**

- 🐛 Buggy and glitchy at times
- 🤔 Confusing and not very user-friendly
- 📱 Poor mobile app experience
- 💰 Expensive subscription model
- 🤯 Frustrating issues with logging workouts

**Reported bugs**

- Subscription cancellation and billing problems
- Frequent crashes and white screens
- Inability to log certain workout types
- Barcode scanner and movement tracking issues
- Problems with data syncing and history display

**Requested features**

- Add dark mode or black background option
- Integrate with Apple Health and other fitness apps
- Improve custom workout creation and logging
- Provide better social/community features
- Fix issues with loading and saving workout data


### 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 btwb free?

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

### Is Interval Flow free?

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

### Which has better reviews, btwb or Interval Flow?

Interval Flow is rated higher. btwb averages 4.6 out of 5 from 1.5K ratings, while Interval Flow averages 4.7 from 168 ratings.

### Do btwb or Interval Flow have ads?

Neither btwb nor Interval Flow shows ads.

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

btwb ships an update weekly, and Interval Flow fortnightly. Most recently, btwb was updated on September 22, 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.*