# Stacks Timer vs Wroom

The clearest difference is in-app purchases: Stacks Timer at none against Wroom's 9. Stacks Timer also leads on review sentiment (80% vs 69%) and iOS requirement (8.0 vs 12.0). Wroom's advantage is rating (4.3 vs 4.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Wroom sells 9 one-off in-app purchases. Stacks Timer asks for nothing beyond the download.

Wroom holds the better App Store score, 4.3 against 4.0. Both are backed by a comparable volume of ratings — 10 and 15 respectively. Written reviews complicate that: 80% of Stacks Timer's written reviews are positive against 69% of Wroom's, so the app with the better star average is not the one people write more warmly about.

Stacks Timer ships an update every 11 months, Wroom every 17 months. The most recent releases landed on September 30, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Stacks Timer | Wroom |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (10 ratings)](https://appshunter.io/ios/app/stacks-timer/id501180699/reviews) | **[4.3 (15 ratings)](https://appshunter.io/ios/app/wroom-engine-sounds/id1564742594/reviews)** |
| Number of ratings | 10 | **15** |
| Positive reviews | **80.0% of reviews** | 69.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 11 months** | Every 17 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 23 MB | 57 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Codedcognition Ltd](https://appshunter.io/developer/1796647737) | [Firesoft Oy](https://appshunter.io/developer/1564742596) |

## What reviewers say

### Stacks Timer

[App page](https://appshunter.io/ios/app/stacks-timer/id501180699)

This app provides a simple and intuitive way to time speed stacking sessions. It records your best scores, calculates average times, and offers tutorials for beginners and experienced stackers alike. Share your achievements on social media.

**Highlights:** Speed stacking timing, Score saving, Average time calculation, Stacking tutorials, Social media sharing

**Features:** macOS Compatibility

**In-app purchases:** none


### Wroom

[App page](https://appshunter.io/ios/app/wroom-engine-sounds/id1564742594)

Transform your ride into a thrilling experience with realistic engine sounds. This app uses your device's GPS and accelerometer to dynamically adjust the engine noise based on your speed and pedaling, even simulating gear changes for added immersion.

**Highlights:** Dynamic engine sound based on speed, GPS and accelerometer integration, Simulated gear changes, Realistic sports car and motorcycle sounds, Enhances riding and driving fun

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 2.0L I4 | $1.99 | one-time |
| 3.0L I6 | $1.99 | one-time |
| 5.2L V8 | $1.99 | one-time |
| 6.0L V12 | $1.99 | one-time |
| 1000cc | $1.99 | one-time |
| EV | $1.99 | one-time |
| 5.2L V10 | $1.99 | one-time |
| 1360cc | $1.99 | one-time |
| All Sounds Bundle | $9.99 | one-time |


## Frequently asked questions

### Is Stacks Timer free?

Stacks Timer is free to download, with no in-app purchases.

### Is Wroom free?

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

### Which has better reviews, Stacks Timer or Wroom?

Wroom is rated higher. Stacks Timer averages 4.0 out of 5 from 10 ratings, while Wroom averages 4.3 from 15 ratings.

### Do Stacks Timer or Wroom have ads?

Neither Stacks Timer nor Wroom shows ads.

### Which is updated more often, Stacks Timer or Wroom?

Stacks Timer ships an update every 11 months, and Wroom every 17 months. Most recently, Stacks Timer was updated on September 30, 2026 and Wroom 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.*