# Trancy vs Peptide Library

The clearest difference is in-app purchases: Peptide Library at none against Trancy's 4. Peptide Library also leads on update cadence (every 5 days vs monthly). Trancy's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price and ads there is nothing between them.

Both are free to download. Trancy sells 4 in-app purchases, starting at $3.99 per month. Peptide Library asks for nothing beyond the download.

Trancy ships an update monthly, Peptide Library every 5 days. The most recent releases landed on November 12, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Trancy | Peptide Library |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (238 ratings)](https://appshunter.io/ios/app/trancy-ai-language-learning/id6475022743/reviews)** | — |
| Number of ratings | **238** | — |
| Positive reviews | 69.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Freemium | — |
| Size | 54 MB | 16 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | +4 | 4+ |
| Developer | [L2D LIMITED](https://appshunter.io/developer/1723116510) | [Jay Park](https://appshunter.io/developer/6808156571) |

## What reviewers say

### Trancy

[App page](https://appshunter.io/ios/app/trancy-ai-language-learning/id6475022743)

Transform your favorite YouTube videos and podcasts into interactive language lessons. This app uses AI to provide bilingual subtitles, instant translations, and speaking practice with pronunciation feedback. Learn over 10 languages through real-world content.

**Highlights:** AI bilingual subtitles, Instant word translation, Speaking practice with AI evaluation, Summaries of video content, Sync YouTube subscriptions, Support for 10+ languages

**Features:** macOS Compatibility, iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Trancy monthly | $3.99 | per month |
| Trancy Premium + AI 月订 | $8.99 | per month |
| Trancy Premium - Yearly | $33.49 | per year |
| Trancy Premium + AI 年定 | $74.99 | per year |

**What reviewers like**

- 👍 Great app for learning
- 👍 Useful for English study
- 👍 Excellent AI translation
- 👍 Good for immersion
- 👍 Free to use

**What reviewers complain about**

- 🐛 AI translation issues
- 🐛 Subtitles not always available
- 🐛 Poor AI talk recognition
- 🐛 Inconsistent subtitle quality
- 🐛 Paid features limited

**Reported bugs**

- Crashing after update
- Crashing on iPad
- Crashing when going full screen
- Crashing after purchase
- Crashing on 'My' page

**Requested features**

- Repeat playback function
- Background playback
- Larger font size option
- White background option
- Persian/Farsi language support


### Peptide Library

[App page](https://appshunter.io/ios/app/peptide-library/id6808156569)

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

**In-app purchases:** none


## Frequently asked questions

### Is Trancy free?

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

### Is Peptide Library free?

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

### Do Trancy or Peptide Library have ads?

Neither Trancy nor Peptide Library shows ads.

### Which is updated more often, Trancy or Peptide Library?

Trancy ships an update monthly, and Peptide Library every 5 days. Most recently, Trancy was updated on November 12, 2026 and Peptide Library on October 31, 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.*