# Interval Flow vs Personal Trainer AI

Interval Flow and Personal Trainer AI both sit at 4.7 stars, but that hides the real split: 94% of Personal Trainer AI's written reviews are positive against 48% of Interval Flow's. Personal Trainer AI also leads on monetization model (free with in-app purchases vs subscription) and update cadence (every 6 days vs fortnightly). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Interval Flow sells 10 in-app purchases, starting at $4.99 per 3 months and Personal Trainer AI sells 4 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for Interval Flow against 4.6 for Personal Trainer AI. Both are backed by a comparable volume of ratings — 168 and 106 respectively. Written reviews are what separate them: 48% of Interval Flow's written reviews are positive against 94% of Personal Trainer AI's.

Interval Flow ships an update fortnightly, Personal Trainer AI every 6 days. The most recent releases landed on September 5, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Interval Flow | Personal Trainer AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (168 ratings)](https://appshunter.io/ios/app/interval-flow-wod-timer/id6444124987/reviews)** | [4.6 (106 ratings)](https://appshunter.io/ios/app/personal-trainer-ai/id6445799141/reviews) |
| Number of ratings | **168** | 106 |
| Positive reviews | 48.1% of reviews | **94.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 6 days** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 20 MB | 243 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Bence Kaposzta](https://appshunter.io/developer/1650069302) | [Starhive Concept Srl](https://appshunter.io/developer/1644692407) |

## What reviewers say

### 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 |


### Personal Trainer AI

[App page](https://appshunter.io/ios/app/personal-trainer-ai/id6445799141)

This app uses AI-powered form analysis and real-time feedback to guide your workouts. It creates personalized plans for various fitness goals and tracks your progress, offering a comprehensive fitness experience.

**Highlights:** AI-powered form analysis, Personalized workout plans, Real-time voice feedback, Progress tracking, Pre-made video workouts, Warm-up and cool-down routines

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access | $3.99 | per month |
| Unlimited access | $14.99 | per 6 months |
| Unlimited access | $24.99 | per year |
| Unlimited Access - Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Interval Flow free?

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

### Is Personal Trainer AI free?

Personal Trainer AI is free to download, with in-app purchases available.

### Which has better reviews, Interval Flow or Personal Trainer AI?

Interval Flow is rated higher. Interval Flow averages 4.7 out of 5 from 168 ratings, while Personal Trainer AI averages 4.6 from 106 ratings.

### Do Interval Flow or Personal Trainer AI have ads?

Neither Interval Flow nor Personal Trainer AI shows ads.

### Which is updated more often, Interval Flow or Personal Trainer AI?

Interval Flow ships an update fortnightly, and Personal Trainer AI every 6 days. Most recently, Interval Flow was updated on September 5, 2026 and Personal Trainer AI on September 16, 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.*