# CKT EM system vs Cuspart

The clearest difference is in-app purchases: CKT EM system at none against Cuspart's 10. CKT EM system also leads on ads (none vs shown) and iOS requirement (11.0 vs 16.6). Cuspart's advantage is update cadence (every 2 months vs every 10 months). On price and device support there is nothing between them.

Both are free to download. Cuspart sells 10 in-app purchases, starting at $1.99 per month. CKT EM system asks for nothing beyond the download.

CKT EM system ships an update every 10 months, Cuspart every 2 months. The most recent releases landed on October 4, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | CKT EM system | Cuspart |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Every 2 months** |
| Size | 55 MB | 79 MB |
| Requires iOS | **11.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Norray Resource Pty. Ltd.](https://appshunter.io/developer/1054877991) | [Mustafa Tolga DALBUDAK](https://appshunter.io/developer/1479052908) |

## What reviewers say

### CKT EM system

[App page](https://appshunter.io/ios/app/ckt-em-system/id1538725058)

**Features:** macOS Compatibility

**In-app purchases:** none


### Cuspart

[App page](https://appshunter.io/ios/app/cuspart-db-meter/id6477875540)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cuspart: Sound Level | $1.99 | per month |
| Cuspart: Sound Level | $5.99 | per 3 months |
| Cuspart: Sound Level | $12.99 | per year |
| Upgrade to Pro | $0.99 | one-time |
| Espresso | $1.49 | one-time |
| Flat White | $1.99 | one-time |
| Caffè Americano | $2.49 | one-time |
| Caffè Mocha | $2.99 | one-time |
| Classic Hot Chocolate | $3.49 | one-time |
| Special Hot Chocolate | $3.99 | one-time |


## Frequently asked questions

### Is CKT EM system free?

CKT EM system is free to download, with no in-app purchases.

### Is Cuspart free?

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

### Do CKT EM system or Cuspart have ads?

Cuspart shows ads; CKT EM system does not.

### Which is updated more often, CKT EM system or Cuspart?

CKT EM system ships an update every 10 months, and Cuspart every 2 months. Most recently, CKT EM system was updated on October 4, 2026 and Cuspart on October 1, 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.*