# GainMatrix vs Surge

The clearest difference is price: GainMatrix at Free against Surge's $2.99. GainMatrix also leads on iOS requirement (15.1 vs 18.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

GainMatrix is free to download; Surge costs $2.99 up front. GainMatrix sells 4 in-app purchases, starting at $2.99 per month and Surge sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

GainMatrix ships an update weekly, Surge fortnightly. The most recent releases landed on October 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | GainMatrix | Surge |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/surge-interval-timer-and-hiit/id6762224044/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | — | Paid |
| Size | 64 MB | 1 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Ulas Uzunyayla](https://appshunter.io/developer/1858691953) | [Matthew Avery](https://appshunter.io/developer/1893424317) |

## What reviewers say

### GainMatrix

[App page](https://appshunter.io/ios/app/gainmatrix-ai-workout-tracker/id6756138508)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GainMatrix Pro | $2.99 | per month |
| GainMatrix Pro | $4.99 | per month |
| GainMatrix Pro | $17.99 | per year |
| GainMatrix Pro | $24.99 | per year |


### Surge

[App page](https://appshunter.io/ios/app/surge-interval-timer-and-hiit/id6762224044)

This interval timer app supports various workout styles like HIIT, Tabata, and boxing rounds. It offers customizable work/rest periods, round counts, and presets, with clear audio and haptic cues to guide your training without needing to watch the clock.

**Highlights:** Customizable work and rest periods, Adjustable round counts, Pre-set workout modes (HIIT, Tabata, Boxing), Audio and haptic cues, Save custom workout presets, Glanceable countdown timer

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Surge Pro | $0.99 | one-time |


## Frequently asked questions

### Is GainMatrix free?

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

### Is Surge free?

Surge costs $2.99, and also offers in-app purchases.

### Do GainMatrix or Surge have ads?

Neither GainMatrix nor Surge shows ads.

### Which is updated more often, GainMatrix or Surge?

GainMatrix ships an update weekly, and Surge fortnightly. Most recently, GainMatrix was updated on October 4, 2026 and Surge on October 25, 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.*