# Pinu vs Potential Converter

The clearest difference is rating: Potential Converter at 5.0 against Pinu's 4.2. Potential Converter also leads on in-app purchases (none vs 6). Pinu's advantage is update cadence (every 10 days vs every 6 months) and ratings volume (43 vs 1). On price, ads and monetization model there is nothing between them.

Both are free to download. Pinu sells 6 in-app purchases, starting at $4.99 per 7 days. Potential Converter asks for nothing beyond the download.

Potential Converter holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Pinu has 43 ratings behind it against 1, so its average is the more settled of the two.

Pinu ships an update every 10 days, Potential Converter every 6 months. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Pinu | Potential Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (43 ratings)](https://appshunter.io/ios/app/pinu-language-learning/id6758291757/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/potential-converter/id6760157743/reviews)** |
| Number of ratings | **43** | 1 |
| Positive reviews | 52.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 6 months |
| Monetization | Free | Free |
| Best chart rank | **#70** | — |
| Size | 142 MB | 0 MB |
| Requires iOS | **15.0** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [LEAF BOAT TECHNOLOGY LIMITED](https://appshunter.io/developer/1710999754) | [Dianzhao Lin](https://appshunter.io/developer/1882906950) |

## What reviewers say

### Pinu

[App page](https://appshunter.io/ios/app/pinu-language-learning/id6758291757)

**Currently charting:** #70 Top Free · Education (US App Store)

This app transforms language learning into a fun, game-like experience. It focuses on interactive lessons and real-world speaking practice to build confidence. Learn a new language step-by-step with a supportive virtual buddy.

**Highlights:** Gamified learning journey, Interactive map-based lessons, Virtual language buddy support, Real-world speaking practice, Instant feedback on exercises, Progressive language acquisition

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pinu - Languages Learning | $4.99 | per 7 days |
| Pinu | $15.99 | per month |
| Pinu | $15.99 | per month |
| Pinu | $99.99 | per year |
| Pinu | $99.99 | per year |
| Avatar Outfit Set | $1.99 | one-time |


### Potential Converter

[App page](https://appshunter.io/ios/app/potential-converter/id6760157743)

This tool helps electrochemists, researchers, and students quickly convert measured potentials between various reference electrode scales. It supports 19 common electrodes and provides educational information, working offline with an intuitive interface.

**Highlights:** Convert between 19 common reference electrodes, Instant, real-time conversions, Supports SHE, Ag/AgCl, SCE, MSE, and more, Educational information on reference electrodes, Clean, intuitive interface, Offline functionality, Copy results with one tap

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

**In-app purchases:** none


## Frequently asked questions

### Is Pinu free?

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

### Is Potential Converter free?

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

### Which has better reviews, Pinu or Potential Converter?

Potential Converter is rated higher. Pinu averages 4.2 out of 5 from 43 ratings, while Potential Converter averages 5.0 from 1 ratings.

### Do Pinu or Potential Converter have ads?

Neither Pinu nor Potential Converter shows ads.

### Which is updated more often, Pinu or Potential Converter?

Pinu ships an update every 10 days, and Potential Converter every 6 months. Most recently, Pinu was updated on October 14, 2026 and Potential Converter on October 5, 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.*