# SOUNDSLAYER Engine vs About Right

The clearest difference is in-app purchases: SOUNDSLAYER Engine at none against About Right's 2. SOUNDSLAYER Engine also leads on update cadence (every 8 months vs every 17 months) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. About Right sells 2 one-off in-app purchases. SOUNDSLAYER Engine asks for nothing beyond the download.

SOUNDSLAYER Engine ships an update every 8 months, About Right every 17 months. The most recent releases landed on September 14, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | SOUNDSLAYER Engine | About Right |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/about-right/id6708229985/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 17 months |
| Monetization | — | Free |
| Size | 63 MB | 3 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [PANASONIC ENTERTAINMENT & COMMUNICATION CO., LTD.](https://appshunter.io/developer/1668304757) | [Platform Goblin LLC](https://appshunter.io/developer/1769874078) |

## What reviewers say

### SOUNDSLAYER Engine

[App page](https://appshunter.io/ios/app/soundslayer-engine/id6503490203)

**In-app purchases:** none


### About Right

[App page](https://appshunter.io/ios/app/about-right/id6708229985)

Easily maintain a running count for various purposes, from tracking expenses to monitoring guest lists. Its intuitive one-handed design allows for quick additions and subtractions to your tally.

**Highlights:** One-handed operation, Add or subtract to tally, Store and retrieve tallies, Simple interface, Track expenses, Monitor guest counts

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Supporter Upgrade | $0.99 | one-time |
| Premium Upgrade | $1.99 | one-time |


## Frequently asked questions

### Is SOUNDSLAYER Engine free?

SOUNDSLAYER Engine is free to download, with no in-app purchases.

### Is About Right free?

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

### Do SOUNDSLAYER Engine or About Right have ads?

Neither SOUNDSLAYER Engine nor About Right shows ads.

### Which is updated more often, SOUNDSLAYER Engine or About Right?

SOUNDSLAYER Engine ships an update every 8 months, and About Right every 17 months. Most recently, SOUNDSLAYER Engine was updated on September 14, 2026 and About Right on September 23, 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.*