# Strongify vs Interval Flow

The clearest difference is monetization model: Strongify at free with in-app purchases against Interval Flow's subscription. Strongify also leads on review sentiment (72% vs 48%). Interval Flow's advantage is rating (4.7 vs 4.5). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Strongify sells 6 in-app purchases, starting at $4.99 per 7 days and Interval Flow sells 10 in-app purchases, starting at $4.99 per 3 months. Whichever you choose, the download price is not the number that matters.

Interval Flow holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 280 and 168 respectively. Written reviews complicate that: 72% of Strongify's written reviews are positive against 48% of Interval Flow's, so the app with the better star average is not the one people write more warmly about.

Strongify ships an update every 8 days, Interval Flow fortnightly. The most recent releases landed on October 5, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Strongify | Interval Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (280 ratings)](https://appshunter.io/ios/app/strongify-rep-count/id1436592070/reviews) | **[4.7 (168 ratings)](https://appshunter.io/ios/app/interval-flow-wod-timer/id6444124987/reviews)** |
| Number of ratings | **280** | 168 |
| Positive reviews | **71.7% of reviews** | 48.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Fortnightly |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 34 MB | 20 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Astrochimp SRL](https://appshunter.io/developer/1611331415) | [Bence Kaposzta](https://appshunter.io/developer/1650069302) |

## What reviewers say

### Strongify

[App page](https://appshunter.io/ios/app/strongify-rep-count/id1436592070)

Easily log your weightlifting sessions by recording reps and weight lifted. Customize exercises and routines, then track your progress over time with motivating charts and a workout calendar. Share your achievements on social media.

**Highlights:** Log reps and weight in few taps, Create custom routines and exercises, Track progress with charts, Workout calendar view, Share workouts on social media, Support for time-based exercises

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Strongify Weekly Plan | $4.99 | per 7 days |
| Strongify Premium One Month | $7.99 | per month |
| Strongify Annual Plan | $24.99 | per year |
| Strongify Premium One Year | $29.99 | per year |
| Strongify Premium | $8.99 | one-time |
| Lifetime Premium | $49.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Smooth and clean interface
- 💡 Customizable workouts
- 👍 Helpful for tracking progress
- 👍 Great for basic workout tracking needs

**What reviewers complain about**

- 🐛 Bugs causing data loss after updates
- 🔍 Lack of advanced features (e.g., notes, folders, custom exercise library)
- 🔍 Limited data visualization and reporting
- 🔍 Inability to change measurement units within the app

**Reported bugs**

- Workout data getting deleted after updates
- Scrolling issues and screen freezes
- Inconsistent Apple Watch integration
- Incorrect workout data display

**Requested features**

- Add ability to pre-plan workouts
- Implement dark mode
- Improve Apple Watch integration
- Add notes section for each exercise
- Allow rearranging and organizing of exercises


### 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 |

**What reviewers like**

- 👍 Nicely designed with good features
- 👍 Unique and brilliantly for keeping fit
- 👍 Simplicity gets it done

**What reviewers complain about**

- 🐛 App crashes on launch
- 🐛 App doesn't remember interval settings
- 🐛 App rearranges workout order
- 🐛 Cannot see questionnaire properly
- 🐛 Robot voice with no visual instructions

**Reported bugs**

- Programs deleted after update
- App crashes when adding a program
- Show/Hide Instructions adds time to interval
- App defaults to unused workout
- Cannot permanently skip to end of timed activity

**Requested features**

- Increase repetitions to 20
- Streamline adding intervals
- Make it possible to hide unused workouts
- Add music integration or option
- Provide visual instructions for moves


## Frequently asked questions

### Is Strongify free?

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

### Is Interval Flow free?

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

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

Interval Flow is rated higher. Strongify averages 4.5 out of 5 from 280 ratings, while Interval Flow averages 4.7 from 168 ratings.

### Do Strongify or Interval Flow have ads?

Neither Strongify nor Interval Flow shows ads.

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

Strongify ships an update every 8 days, and Interval Flow fortnightly. Most recently, Strongify was updated on October 5, 2026 and Interval Flow on October 2, 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.*