# OlympiadMath vs letet

The clearest difference is in-app purchases: OlympiadMath at none against letet's 3. OlympiadMath also leads on ads (none vs shown) and update cadence (every 2 days vs every 6 weeks). On price there is nothing between them.

Both are free to download. letet sells 3 in-app purchases, starting at $3.99 per month. OlympiadMath asks for nothing beyond the download.

OlympiadMath ships an update every 2 days, letet every 6 weeks. The most recent releases landed on October 28, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | OlympiadMath | letet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/letet-lettertainment/id6798316195/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Every 6 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 18 MB | 67 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Devois Inc](https://appshunter.io/developer/1535268107) | [THE NEWUS COMPANY LIMITED](https://appshunter.io/developer/1783124245) |

## What reviewers say

### OlympiadMath

[App page](https://appshunter.io/ios/app/olympiadmath/id6769341244)

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

**In-app purchases:** none


### letet

[App page](https://appshunter.io/ios/app/letet-lettertainment/id6798316195)

Transform your scrolling time into valuable learning with bite-sized insights on diverse topics. Apply what you learn to your daily life and engage in discussions with a curious community. Save and share knowledge effortlessly.

**Highlights:** Bite-sized insights, Practical application tips, Community discussions, Searchable knowledge base, Personalized knowledge library, Easy sharing

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard Monthly | $3.99 | per month |
| Premium Monthly | $7.99 | per month |
| Premium Yearly | $49.99 | per year |


## Frequently asked questions

### Is OlympiadMath free?

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

### Is letet free?

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

### Do OlympiadMath or letet have ads?

letet shows ads; OlympiadMath does not.

### Which is updated more often, OlympiadMath or letet?

OlympiadMath ships an update every 2 days, and letet every 6 weeks. Most recently, OlympiadMath was updated on October 28, 2026 and letet on November 1, 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.*