Sky Studio vs Boimero
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sky Studio
Create, practice, and play sheet music for "Sky: Children of the Light." Features include composing with editing tools, practicing with adjustable settings, and an instrument pad for free play. Supports multiple music file formats.
- Compose sheet music
- Practice sheet music
- Instrument pad mode
- Save and load scores
- Metronome
- Multiple supported formats (JSON, ABC, MIDI)
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[Note: This app is not made by That Game Company.] The Sky Studio is a tool to make & practice the sheet music of "Sky: children of the light" simply. -Overall feature- 1. Compose mode: Create sheet music, and listen to it. 2. Practice mode: Practice sheet music. 4. Instrument pad mode: Separate instrument pads to play freely. [Compose mode] 1. Save & Load the sheet music 2. Play & Pause 3. Metronome 4. Double layer system 5. Copy, cut, erase, and delete portions of sheet music 6. Select BPM, Pitch, Instrument [Practice mode] 1. Load 2. Practice system(Repeating a specific section, Hiding key, etc) 3. Resize pad, and toggle sheet view mode 4. Play & Pause the sheet 5. Metronome 6. Select BPM, Pitch, Instrument [Instrument pad mode] 1. Select Pitch, Instrument 2. Resize pad 3. Metronome [ETC] 1. Cave effect(Thanks to Specy) [Supproted format] 1. Json - Compatible with many other fan made programs, support encryption. 2. ABC1/5 - Easy to understand. A1,A2,...,C4,C5 means 15 keys, '.' means delay. 3. Midi - Officially used format in music work. [Json - Encryption] The purpose of this feature is to prevent abusing other people's score for automatic playing in the game(macro). Please activate this when you share sheet files at the community.
Boimero
Create original songs without singing by arranging notes and lyrics on a piano roll. This app generates AI singing voices using advanced models, allowing for offline music production on your mobile device. It supports various file formats and voicebanks for flexible music creation.
- Intuitive piano roll for melody creation
- Lyric input for individual notes
- Multi-track song building
- Import UTAU, VOICEVOX, MIDI, UST, and MusicXML
- AI singing voice generation with DiffSinger
- Offline voice generation
- Export and share finished audio
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Boimero is a vocal synthesis and music creation app that lets you make original songs without recording your own voice. Simply arrange notes on the piano roll and enter lyrics to generate a singing voice. Whether you are new to songwriting or an experienced creator, Boimero makes it easy to produce music on your iPhone or iPad. Voice generation runs on your device, so you can compose songs and generate vocals offline. KEY FEATURES • Create melodies with an intuitive piano roll • Enter lyrics for individual notes • Build songs with multiple tracks • Import UTAU voicebanks • Generate AI singing voices with DiffSinger models • Use compatible VOICEVOX models • Import MIDI, UST, and MusicXML files • Adjust tempo, volume, and other song settings • Export and share your finished audio BOIMERO IS GREAT FOR • Creating songs without recording your own voice • Making vocal-synth and character-voice music on mobile • Working with UTAU and DiffSinger voice models • Editing MIDI and UST files away from your computer • Learning vocal synthesis and songwriting Turn your notes and lyrics into a singing voice. Create music freely with Boimero. Features and available voices may vary depending on your device, plan, and installed models. Terms of Use: https://www.apple.com/legal/internet-services/itunes/us/terms.html
Screenshots
Verdict
The clearest difference is in-app purchases: Sky Studio at none against Boimero's 4. Sky Studio also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.1). Boimero's advantage is update cadence (daily vs every 2 weeks) and review sentiment (88% vs 79%). On price, rating 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
Both are free to download. Boimero sells 4 in-app purchases, starting at $0.99 per month. Sky Studio asks for nothing beyond the download.
Boimero holds the better App Store score, 4.6 against 4.4. Both are backed by a comparable volume of ratings — 118 and 579 respectively. Written reviews point the same way: 79% of Sky Studio's written reviews are positive against 88% of Boimero's.
Sky Studio ships an update every 2 weeks, Boimero daily. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.
| Parameter | Sky Studio | Boimero |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (118 ratings) | 4.6 (579 ratings) — better |
| Positive reviews | 79.3% of reviews | 88.4% of reviews — better |
| Number of ratings | 118 | 579 — better |
| Update frequency | Every 2 weeks | Daily — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 80 MB | 393 MB |
| Age rating | 4+ | 4+ |
| Developer | JoneRyeol Kim | Waffle, LCC |
Customer experience
Sky Studio
Boimero
User reviews
Sky Studio
From 118 App Store ratingsWhat we love
- 👍 Great app for learning music
- 👍 Easy to use and practice
- 👍 Helpful for beginners
- 👍 Useful for practicing outside the game
- 👍 Good for composing music
Room to improve
- 🐛 Sound issues (no sound, delayed sound)
- 🐛 Saved work corrupted/jumbled
- 🐛 Instruments don't sound like in-game
- 🐛 App size issues (too big, not resizable)
- 🐛 Pitch is too high compared to the game
Boimero
From 579 App Store ratingsWhat we love
- 👍 Easy to use
- 🎨 Helpful for creating music
- 💡 Good mobile vocaloid alternative
- 🎶 Enjoyable for composing songs
Room to improve
- 🐛 Buggy and glitchy at times
- 💰 Too many ads and paid features
- 🌐 Lack of English support
Bugs and requests
Sky Studio
Reported bugs
8 issues- No sound or intermittent sound
- Saved songs become corrupted or jumbled
- Autoplay is out of sync with screen display
- Input method takes over the entire screen when saving compositions
- App crashes or closes unexpectedly
Show 3 moreShow fewer
- Background doesn't change on the score interface
- Cannot tap the screen in the new update
- One key is unplayable when pressing two keys simultaneously
Requested features
11 requests- Make the app resizable
- Add iPad accessibility
- Sync in-game instruments
- Add more instruments (Pipa/Chinese Lute, Horn, etc.)
- Add Game Center/Apple/Facebook sign-in for data saving
Show 6 moreShow fewer
- Improve sound quality to match in-game sounds
- Add a pitch adjustment feature
- Add simplified Chinese notation (数字简谱)
- Add a feature to recover unsaved work
- Fix background changing issue on score interface
- Allow simultaneous pressing of multiple keys without issue
Boimero
Reported bugs
3 issues- Lyrics not working as expected
- Audio playback issues after watching ads
- Tutorial/help content not loading
Requested features
4 requests- More voicebank options
- Improved pitch/tuning controls
- Better lyric integration
- English language support
In-app purchases
Sky Studio
No in-app purchases
Boimero
- ボイメロプレミアム$0.991 Month
- ボイメロプレミアム$1.991 Month
- ボイメロプレミアム$5.991 Year
- ボイメロプレミアム$9.99








