# GPS String vs 88Keys Multi Tones Piano

The clearest difference is in-app purchases: GPS String at none against 88Keys Multi Tones Piano's 1. GPS String also leads on ads (none vs shown) and update cadence (every 3 days vs every 3 months). On price, review sentiment and device support there is nothing between them.

Both are free to download. 88Keys Multi Tones Piano sells 1 one-off in-app purchase. GPS String asks for nothing beyond the download.

GPS String ships an update every 3 days, 88Keys Multi Tones Piano every 3 months. The most recent releases landed on October 7, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | GPS String | 88Keys Multi Tones Piano |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/88keys-multi-tones-piano/id1546188713/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 226 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Takuo Matsumura](https://appshunter.io/developer/1076447675) | [KANIYONIKA](https://appshunter.io/developer/1546188715) |

## What reviewers say

### GPS String

[App page](https://appshunter.io/ios/app/gps-string/id1097060152)

Measure distances between two points on a map, calculate areas by marking three or more points, and save or copy results. It also provides current GPS location data that can be copied for use in emails or notes.

**Highlights:** Measure distance between two points, Calculate area with three or more points, Save and copy measurement results, Switch map views (map, satellite, hybrid), Copy current GPS location, Toggle GPS data display (angle, DMS)

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

**In-app purchases:** none


### 88Keys Multi Tones Piano

[App page](https://appshunter.io/ios/app/88keys-multi-tones-piano/id1546188713)

This application offers a virtual piano experience with multiple instrument sounds like strings, bass, and drums. It features two piano rolls for easy playing across a wide range and includes volume and reverb controls.

**Highlights:** Dual piano rolls, Multiple instrument tones, Volume and reverb controls, Adjustable tuning (440/442 Hz), Steinway & Sons piano sound

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $1.99 | one-time |


## Frequently asked questions

### Is GPS String free?

GPS String is free to download, with no in-app purchases.

### Is 88Keys Multi Tones Piano free?

88Keys Multi Tones Piano is free to download, with in-app purchases available.

### Do GPS String or 88Keys Multi Tones Piano have ads?

88Keys Multi Tones Piano shows ads; GPS String does not.

### Which is updated more often, GPS String or 88Keys Multi Tones Piano?

GPS String ships an update every 3 days, and 88Keys Multi Tones Piano every 3 months. Most recently, GPS String was updated on October 7, 2026 and 88Keys Multi Tones Piano on October 19, 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.*