# Nervous System vs Dentest

The clearest difference is in-app purchases: Nervous System at none against Dentest's 10. Nervous System also leads on update cadence (monthly vs every 5 months) and iOS requirement (12.0 vs 15.0). Dentest's advantage is device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Dentest sells 9 one-off in-app purchases. Nervous System asks for nothing beyond the download.

Nervous System ships an update monthly, Dentest every 5 months. The most recent releases landed on September 22, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Nervous System | Dentest |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Size | 1.3 GB | 109 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Hong Kong Metropolitan University](https://appshunter.io/developer/432474107) | [Sanjana Mathew](https://appshunter.io/developer/1636107671) |

## What reviewers say

### Nervous System

[App page](https://appshunter.io/ios/app/nervous-system/id1506863463)

**Features:** macOS Compatibility

**In-app purchases:** none


### Dentest

[App page](https://appshunter.io/ios/app/dentest/id6443812493)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 450 Coins | $3.99 | one-time |
| 750 Coins | $4.99 | one-time |
| 1000 coins | $5.99 | one-time |
| earn 1000 coins | $5.99 | one-time |
| earn 1800 coins | $8.99 | one-time |
| 2500 Coins | $10.99 | one-time |
| 2500 coins | $10.99 | one-time |
| 3500 Coins | $15.99 | one-time |
| 3500 coins | $15.99 | one-time |


## Frequently asked questions

### Is Nervous System free?

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

### Is Dentest free?

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

### Do Nervous System or Dentest have ads?

Neither Nervous System nor Dentest shows ads.

### Which is updated more often, Nervous System or Dentest?

Nervous System ships an update monthly, and Dentest every 5 months. Most recently, Nervous System was updated on September 22, 2026 and Dentest on September 10, 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.*