# OSUN2 vs OTL

The clearest difference is update cadence: OTL at monthly against OSUN2's every 28 months. OSUN2's advantage is iOS requirement (9.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

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

OSUN2 ships an update every 28 months, OTL monthly. The most recent releases landed on September 16, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | OSUN2 | OTL |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 92.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 28 months | **Monthly** |
| Monetization | — | Free |
| Size | 20 MB | 115 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [ShenZhen YOUNG WIN Technology Co., Ltd.](https://appshunter.io/developer/1405507279) | [SPARCS](https://appshunter.io/developer/1687472027) |

## What reviewers say

### OSUN2

[App page](https://appshunter.io/ios/app/osun2/id1504606789)

**Features:** macOS Compatibility

**In-app purchases:** none


### OTL

[App page](https://appshunter.io/ios/app/otl/id1579878255)

Easily search for all courses, view your daily schedule at a glance, and get notified about important academic dates. Organize your next semester's timetable, compare various metrics, and read and rate course reviews.

**Highlights:** Course search and filtering, Daily schedule overview, Academic event notifications, Timetable creation and comparison, Course review reading and rating, Personalized academic information

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

**In-app purchases:** none


## Frequently asked questions

### Is OSUN2 free?

OSUN2 is free to download, with no in-app purchases.

### Is OTL free?

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

### Do OSUN2 or OTL have ads?

Neither OSUN2 nor OTL shows ads.

### Which is updated more often, OSUN2 or OTL?

OSUN2 ships an update every 28 months, and OTL monthly. Most recently, OSUN2 was updated on September 16, 2026 and OTL on September 20, 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.*