# PTIT S vs Retudy

PTIT S and Retudy are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

PTIT S ships an update every 9 days, Retudy fortnightly. Both last shipped on October 24, 2026.

## The numbers

| Metric | PTIT S | Retudy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (39 ratings)](https://appshunter.io/ios/app/ptit-s-link/id1545808013/reviews)** | — |
| Number of ratings | **39** | — |
| Positive reviews | 25.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Fortnightly |
| Monetization | Free | — |
| Size | 67 MB | 42 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [AISoft](https://appshunter.io/developer/1534825275) | [DIGITAL FIDELITY VIETNAM JOINT STOCK COMPANY](https://appshunter.io/developer/1839866645) |

## What reviewers say

### PTIT S

[App page](https://appshunter.io/ios/app/ptit-s-link/id1545808013)

This application provides essential functions for students, lecturers, and administrative staff to support the digital transformation efforts of an academic institution. It aims to enhance training and research quality through streamlined operations.

**Highlights:** Digital transformation support, Enhanced training quality, Improved research quality, Essential functions for users, Streamlined operations

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

**In-app purchases:** none


### Retudy

[App page](https://appshunter.io/ios/app/retudy/id6746403711)

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

**In-app purchases:** none


## Frequently asked questions

### Is PTIT S free?

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

### Is Retudy free?

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

### Do PTIT S or Retudy have ads?

Neither PTIT S nor Retudy shows ads.

### Which is updated more often, PTIT S or Retudy?

PTIT S ships an update every 9 days, and Retudy fortnightly. Most recently, PTIT S was updated on October 24, 2026 and Retudy on October 24, 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.*