# Big O Notation vs Let's Practice Russian

The clearest difference is iOS requirement: Big O Notation at 15.1 against Let's Practice Russian's 26.4. 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.

## The numbers

| Metric | Big O Notation | Let's Practice Russian |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lets-practice-russian/id6792575733/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Daily |
| Monetization | — | Free |
| Size | 38 MB | 207 MB |
| Requires iOS | **15.1** | 26.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AFTW LLC](https://appshunter.io/developer/1886356149) | [Dylan Rhodes](https://appshunter.io/developer/1865752307) |

## What reviewers say

### Big O Notation

[App page](https://appshunter.io/ios/app/big-o-notation/id6771656290)

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

**In-app purchases:** none


### Let's Practice Russian

[App page](https://appshunter.io/ios/app/lets-practice-russian/id6792575733)

This app helps you build Russian reading, vocabulary, and grammar skills through bite-sized drills. It's designed for quick daily practice, catering to all learner levels from beginner to advanced, allowing you to learn at your own pace.

**Highlights:** Reading practice drills, Vocabulary building, Grammar reflex training, Audio pronunciation, Review missed words, Bite-sized daily practice

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

**In-app purchases:** none


## Frequently asked questions

### Is Big O Notation free?

Big O Notation is free to download, with no in-app purchases.

### Is Let's Practice Russian free?

Let's Practice Russian is free to download, with no in-app purchases.

### Do Big O Notation or Let's Practice Russian have ads?

Neither Big O Notation nor Let's Practice Russian shows ads.

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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.*