# Starting Strength (Legacy) vs Interval Flow

The clearest difference is price: Interval Flow at Free against Starting Strength (Legacy)'s $14.99. Interval Flow also leads on update cadence (fortnightly vs every 5 weeks). Starting Strength (Legacy)'s advantage is review sentiment (83% vs 48%) and ratings volume (2.6K vs 168). On rating, ads, in-app purchases and device support there is nothing between them.

Interval Flow is free to download; Starting Strength (Legacy) costs $14.99 up front. Starting Strength (Legacy) sells 8 in-app purchases, starting at $19.99 per 3 months 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.

On the App Store both sit at effectively the same score — 4.8 for Starting Strength (Legacy) against 4.7 for Interval Flow. That said, the two scores are not equally well evidenced: Starting Strength (Legacy) has 2.6K ratings behind it against 168, so its average is the more settled of the two. Written reviews are what separate them: 83% of Starting Strength (Legacy)'s written reviews are positive against 48% of Interval Flow's.

Starting Strength (Legacy) ships an update every 5 weeks, Interval Flow fortnightly. The most recent releases landed on September 26, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | Starting Strength (Legacy) | Interval Flow |
| --- | --- | --- |
| Price | $14.99 | **Free** |
| Rating | **[4.8 (2.6K ratings)](https://appshunter.io/ios/app/starting-strength-legacy/id1008697836/reviews)** | [4.7 (168 ratings)](https://appshunter.io/ios/app/interval-flow-wod-timer/id6444124987/reviews) |
| Number of ratings | **2.6K** | 168 |
| Positive reviews | **82.9% of reviews** | 48.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | **Paid** | Subscription |
| Size | 239 MB | 20 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Shabu Pty Ltd](https://appshunter.io/developer/1008697835) | [Bence Kaposzta](https://appshunter.io/developer/1650069302) |

## What reviewers say

### Starting Strength (Legacy)

[App page](https://appshunter.io/ios/app/starting-strength-legacy/id1008697836)

This app guides beginners through a proven strength training program with detailed instructions, video demonstrations, and interactive logging. It simplifies tracking progress and calculating weights for exercises like squats, presses, and deadlifts.

**Highlights:** Beginner barbell exercise instructions, Novice strength training program guidance, Interactive workout logging, Warmup and workset weight calculator, Exercise video and photo instructions, Cloud sync for training data, Customizable progression

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 Months Pro | $19.99 | per 3 months |
| Pro Quaterly | $19.99 | per 3 months |
| Annual Pro | $39.99 | per year |
| Single Form Check | $24.99 | one-time |
| Unlock Pro Forever | $59.99 | one-time |
| 3 x Form Checks | $69.99 | one-time |
| 10 Form Checks | $209.99 | one-time |
| 20 x Form Checks | $399.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Helpful for tracking progress
- 💡 Includes book excerpts and videos
- 🔒 Stable and reliable
- 🚀 Calculates warmup sets and plate loading

**What reviewers complain about**

- 🐛 Buggy and crashes frequently
- 🐛 Glitchy graphics and UI issues
- 🔒 Lacks customization options
- 🔒 Limited to the novice linear progression program
- 🔒 No ability to modify exercises or programming

**Reported bugs**

- Frequent crashes and freezes
- Issues with timer functionality
- Problems with weight and plate tracking
- Incompatibility with newer iOS versions
- Bugs when switching between exercises

**Requested features**

- Add ability to modify exercises and programming
- Implement advanced programming options beyond novice linear progression
- Improve stability and reduce crashes
- Add Apple Health integration
- Enhance UI and user experience


### 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 Starting Strength (Legacy) free?

Starting Strength (Legacy) costs $14.99, and also offers in-app purchases.

### Is Interval Flow free?

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

### Which has better reviews, Starting Strength (Legacy) or Interval Flow?

Starting Strength (Legacy) is rated higher. Starting Strength (Legacy) averages 4.8 out of 5 from 2.6K ratings, while Interval Flow averages 4.7 from 168 ratings.

### Do Starting Strength (Legacy) or Interval Flow have ads?

Neither Starting Strength (Legacy) nor Interval Flow shows ads.

### Which is updated more often, Starting Strength (Legacy) or Interval Flow?

Starting Strength (Legacy) ships an update every 5 weeks, and Interval Flow fortnightly. Most recently, Starting Strength (Legacy) was updated on September 26, 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.*