# RT Helper vs NDT Studio

The clearest difference is iOS requirement: RT Helper at 15.1 against NDT Studio's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. RT Helper sells 4 in-app purchases, starting at $6.99 per month and NDT Studio sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | RT Helper | NDT Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Size | 62 MB | 6 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [Dzmitry Dubovik](https://appshunter.io/developer/1856006530) | [Ezar Ahrend](https://appshunter.io/developer/6795534406) |

## What reviewers say

### RT Helper

[App page](https://appshunter.io/ios/app/rt-helper/id6755742319)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RT Helper PRO – Monthly | $6.99 | per month |
| RT Helper PRO – 3 Months | $17.99 | per 3 months |
| RT Helper PRO – 6 Months | $29.99 | per 6 months |
| RT Helper PRO – Yearly | $49.99 | per year |


### NDT Studio

[App page](https://appshunter.io/ios/app/ndt-studio/id6798579824)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NDT Studio Pro Monthly | $2.99 | per month |
| NDT Studio Pro Annual | $29.99 | per year |


## Frequently asked questions

### Is RT Helper free?

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

### Is NDT Studio free?

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

### Do RT Helper or NDT Studio have ads?

Neither RT Helper nor NDT Studio shows ads.

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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.*