# Tonegraph vs MSU

The clearest difference is update cadence: Tonegraph at every 5 days against MSU's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Tonegraph ships an update every 5 days, MSU every 3 months. The most recent releases landed on October 13, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Tonegraph | MSU |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 3 months |
| Size | 15 MB | 14 MB |
| Requires iOS | **12.1** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shinichi Takemura](https://appshunter.io/developer/1441889523) | [Mississippi State University Extension Service](https://appshunter.io/developer/580535523) |

## What reviewers say

### Tonegraph

[App page](https://appshunter.io/ios/app/tonegraph-instrument-tuner/id1441889524)

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

**In-app purchases:** none


### MSU

[App page](https://appshunter.io/ios/app/msu-e-experts-directory/id1499149570)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tonegraph free?

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

### Is MSU free?

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

### Do Tonegraph or MSU have ads?

Neither Tonegraph nor MSU shows ads.

### Which is updated more often, Tonegraph or MSU?

Tonegraph ships an update every 5 days, and MSU every 3 months. Most recently, Tonegraph was updated on October 13, 2026 and MSU on October 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*