# R+ ENGINEER vs Leno

The clearest difference is rating: Leno at 5.0 against R+ ENGINEER's 1.5. Leno also leads on update cadence (weekly vs every 4 months). R+ ENGINEER's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 15.1). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Leno sells 2 in-app purchases, starting at $19.99 per month. R+ ENGINEER asks for nothing beyond the download.

Leno holds the better App Store score, 5.0 against 1.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

R+ ENGINEER ships an update every 4 months, Leno weekly. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | R+ ENGINEER | Leno |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.5 (2 ratings)](https://appshunter.io/ios/app/r-plus-engineer/id1475713920/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/leno-ai-study-and-flashcards/id6803364297/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | **Free** | Freemium |
| Size | 116 MB | 43 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ROBOTIS CO., LTD.](https://appshunter.io/developer/948481761) | [天一 刘](https://appshunter.io/developer/6803313570) |

## What reviewers say

### R+ ENGINEER

[App page](https://appshunter.io/ios/app/r-plus-engineer/id1475713920)

This application connects to a smart device kit, enabling the use of sensors, video, and audio processing. It offers simple programming to control and manipulate the connected hardware, making it an interactive educational tool.

**Highlights:** Connects to ROBOTIS ENGINEER Kit, Utilizes smart device sensors, Supports video/image processing, Enables audio input/output, Intuitive programming interface, Control and manipulate hardware

**Features:** macOS Compatibility

**In-app purchases:** none


### Leno

[App page](https://appshunter.io/ios/app/leno-ai-study-and-flashcards/id6803364297)

Transform your study materials into interactive lessons and practice exams with AI. Master complex subjects through personalized video explanations, deep lecture notes, and active recall flashcards. Get instant feedback and guidance from a 24/7 AI tutor to ace your exams.

**Highlights:** Multi-modal course generation from various inputs, Deep lecture notes with first-principles explanations, AI-powered video lessons with animated visuals, Active recall and spaced repetition flashcards, Targeted interactive practice quizzes, 24/7 personal AI tutor for guidance

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Leno Pro Monthly | $19.99 | per month |
| Leno Pro Yearly | $169.99 | per year |


## Frequently asked questions

### Is R+ ENGINEER free?

R+ ENGINEER is free to download, with no in-app purchases.

### Is Leno free?

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

### Which has better reviews, R+ ENGINEER or Leno?

Leno is rated higher. R+ ENGINEER averages 1.5 out of 5 from 2 ratings, while Leno averages 5.0 from 1 ratings.

### Do R+ ENGINEER or Leno have ads?

Neither R+ ENGINEER nor Leno shows ads.

### Which is updated more often, R+ ENGINEER or Leno?

R+ ENGINEER ships an update every 4 months, and Leno weekly. Most recently, R+ ENGINEER was updated on October 16, 2026 and Leno on October 14, 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.*