# Pitagorin Lite vs NDT Cert Study

The clearest difference is in-app purchases: Pitagorin Lite at none against NDT Cert Study's 9. NDT Cert Study's advantage is update cadence (every 2 months vs every 9 months) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. NDT Cert Study sells 9 one-off in-app purchases. Pitagorin Lite asks for nothing beyond the download.

Pitagorin Lite ships an update every 9 months, NDT Cert Study every 2 months. The most recent releases landed on October 9, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Pitagorin Lite | NDT Cert Study |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Size | 4 MB | 35 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ivan Cabezon Orjales](https://appshunter.io/developer/347664743) | [Simon Shih](https://appshunter.io/developer/1870707682) |

## What reviewers say

### Pitagorin Lite

[App page](https://appshunter.io/ios/app/pitagorin-lite/id6465172231)

**Features:** macOS Compatibility

**In-app purchases:** none


### NDT Cert Study

[App page](https://appshunter.io/ios/app/ndt-cert-study/id6785204471)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CGSB / MT Level I | $9.99 | one-time |
| CGSB / RT Level I | $9.99 | one-time |
| CGSB / PT Level II | $9.99 | one-time |
| CGSB / PT Level I | $9.99 | one-time |
| CGSB / RT Level II | $9.99 | one-time |
| CGSB / UT Level II | $9.99 | one-time |
| CGSB / UT Level I | $9.99 | one-time |
| CGSB / PAUT Level I | $9.99 | one-time |
| CGSB / PAUT Level II | $9.99 | one-time |


## Frequently asked questions

### Is Pitagorin Lite free?

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

### Is NDT Cert Study free?

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

### Do Pitagorin Lite or NDT Cert Study have ads?

Neither Pitagorin Lite nor NDT Cert Study shows ads.

### Which is updated more often, Pitagorin Lite or NDT Cert Study?

Pitagorin Lite ships an update every 9 months, and NDT Cert Study every 2 months. Most recently, Pitagorin Lite was updated on October 9, 2026 and NDT Cert Study on October 8, 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.*