Comparison

21DaysOfChange vs Write Rap Lyrics

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

21DaysOfChange

Features
Read full description

With our clear guidance and a bit of fun, we'll help you transform your habits into something you can be proud of. Imagine growing a tree - starting small, nurturing it daily, and watching it flourish. In just 21 days, you'll cultivate a new habit with tips and strategies that will last a lifetime. Join us on this transformative journey and take control of your lifestyle, one habit at a time. Terms Of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.21daysofchange.app/privacypolicy

About

Write Rap Lyrics

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
Read full description

Write rap lyrics with a syllable count and a rhyme on every bar. Penwork is the journal for the verse, the hook, and the freestyle. Syllable Counter and Rhymes Never lose the count. The syllable counter runs on the line while you write. Rhymes highlight in the verse. Open rhyme groups, end rhymes, or Suggest Rhymes when you need a word that fits. Flow See the stress, the punch, the rhyme density, and how tight the bar sits on the grid. Suggest next lines when you want another bar in the same pocket. Those tools use your own OpenAI or Gemini key, and the key stays on your phone. Beat, Nouns, and Export Keep the BPM and the scale with the note. Add a beat and a vocal. Pull nouns into the line. Export the finished rap lyrics to PDF or Word when you are ready for the studio. iPhone Duo Open the fold and the journal sits on one side while the page sits on the other. The verse stays on the note. Bar hits sit on the other side of the hinge. The phone and the closed cover keep the same writing page. Your book of songs Folders and search keep every verse in one place. Filter by date, BPM, or scale. Penwork is for rappers, lyricists, and poets who write hip-hop songs and want the rhyme in front of them.

Screenshots

21DaysOfChange4 screens
Write Rap Lyrics4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
21DaysOfChange versus Write Rap Lyrics: the parameters behind the verdict, then further details
Parameter21DaysOfChangeWrite Rap Lyrics
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 9 monthsEvery 4 months — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.4 — better26.2
Further details — not scored
Size59 MB2.6 GB
Age rating4+9+
DeveloperHong Son VuSAMUEL S SANCHEZ

In-app purchases

4 purchases

21DaysOfChange

Subscriptions4
  • 21DaysOfChange Monthly Premium$4.991 Month
  • 21DaysOfChange Monthly Business$12.991 Month
  • 21DaysOfChange Yearly Premium$34.991 Year
Show 1 more
  • 21DaysOfChange Yearly Business$89.991 Year
None

Write Rap Lyrics

No in-app purchases

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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