# OTL vs GriDot

The clearest difference is price: OTL at Free against GriDot's $2.99. OTL also leads on in-app purchases (none vs 2) and device support (3 vs 1). GriDot's advantage is iOS requirement (13.0 vs 15.0). On update cadence and ads there is nothing between them.

OTL is free to download; GriDot costs $2.99 up front. GriDot sells 2 in-app purchases, starting at $0.99 per month. OTL asks for nothing beyond the download.

OTL ships an update every 5 weeks, GriDot monthly. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | OTL | GriDot |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Positive reviews | 92.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Free | — |
| Size | 115 MB | 13 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 9+ | 4+ |
| Developer | [SPARCS](https://appshunter.io/developer/1687472027) | [Ming Rong Ng](https://appshunter.io/developer/1613121108) |

## What reviewers say

### 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


### GriDot

[App page](https://appshunter.io/ios/app/gridot/id1613135296)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Yearly | $4.49 | per year |


## Frequently asked questions

### Is OTL free?

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

### Is GriDot free?

GriDot costs $2.99, and also offers in-app purchases.

### Do OTL or GriDot have ads?

Neither OTL nor GriDot shows ads.

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

OTL ships an update every 5 weeks, and GriDot monthly. Most recently, OTL was updated on October 24, 2026 and GriDot on October 27, 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.*