# 21DaysOfChange vs Write Rap Lyrics

The clearest difference is in-app purchases: Write Rap Lyrics at none against 21DaysOfChange's 4. Write Rap Lyrics also leads on update cadence (every 4 months vs every 9 months). 21DaysOfChange's advantage is iOS requirement (16.4 vs 26.2). On price, ads and device support there is nothing between them.

Both are free to download. 21DaysOfChange sells 4 in-app purchases, starting at $4.99 per month. Write Rap Lyrics asks for nothing beyond the download.

21DaysOfChange ships an update every 9 months, Write Rap Lyrics every 4 months. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 21DaysOfChange | Write Rap Lyrics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/write-rap-lyrics-penwork/id6757620114/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 4 months** |
| Monetization | — | Free |
| Size | 59 MB | 2.6 GB |
| Requires iOS | **16.4** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Hong Son Vu](https://appshunter.io/developer/1767993431) | [SAMUEL S SANCHEZ](https://appshunter.io/developer/1867879973) |

## What reviewers say

### 21DaysOfChange

[App page](https://appshunter.io/ios/app/21daysofchange/id6677019535)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 21DaysOfChange Monthly Premium | $4.99 | per month |
| 21DaysOfChange Monthly Business | $12.99 | per month |
| 21DaysOfChange Yearly Premium | $34.99 | per year |
| 21DaysOfChange Yearly Business | $89.99 | per year |


### Write Rap Lyrics

[App page](https://appshunter.io/ios/app/write-rap-lyrics-penwork/id6757620114)

This AI-powered journaling app assists rappers and lyricists in crafting verses. It offers rhyme suggestions, syllable counting, flow analysis, and creative prompts to enhance songwriting and organize lyrics for studio use.

**Highlights:** AI-powered rhyme suggestions, Real-time syllable counter, Flow and emotion analysis, Daily writing prompts, Hip-hop culture insights, Organize and export lyrics

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

**In-app purchases:** none


## Frequently asked questions

### Is 21DaysOfChange free?

21DaysOfChange is free to download, with in-app purchases available.

### Is Write Rap Lyrics free?

Write Rap Lyrics is free to download, with no in-app purchases.

### Do 21DaysOfChange or Write Rap Lyrics have ads?

Neither 21DaysOfChange nor Write Rap Lyrics shows ads.

### Which is updated more often, 21DaysOfChange or Write Rap Lyrics?

21DaysOfChange ships an update every 9 months, and Write Rap Lyrics every 4 months. Most recently, 21DaysOfChange was updated on October 30, 2026 and Write Rap Lyrics 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.*