# Engine vs CoachSLY

Engine and CoachSLY are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Engine sells 2 in-app purchases, starting at $9.99 per month and CoachSLY sells 1 in-app purchase, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 10 days. The most recent releases landed on September 30, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Engine | CoachSLY |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 10 days | Every 10 days |
| Size | 54 MB | 40 MB |
| Requires iOS | **15.1** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Les Nants](https://appshunter.io/developer/1807100390) | [Raphael Mushailov](https://appshunter.io/developer/6779681880) |

## What reviewers say

### Engine

[App page](https://appshunter.io/ios/app/engine-boost-your-vo2max/id6756730497)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $9.99 | per month |
| Yearly Plan | $39.99 | per year |


### CoachSLY

[App page](https://appshunter.io/ios/app/coachsly-wod-training-app/id6779681878)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CoachSLY Pro | $7.99 | per month |


## Frequently asked questions

### Is Engine free?

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

### Is CoachSLY free?

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

### Do Engine or CoachSLY have ads?

Both Engine and CoachSLY show ads.

### Which is updated more often, Engine or CoachSLY?

Engine ships an update every 10 days, and CoachSLY every 10 days. Most recently, Engine was updated on September 30, 2026 and CoachSLY on October 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.*