APM Sweep vs Bitbop
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
APM Sweep
This application helps measure and analyze a room's acoustical performance, including reverberation time and clarity. It suggests materials to improve sound quality and allows for saving, loading, and exporting results in common spreadsheet formats. PDF reports with photos can also be generated.
- Acoustical performance measurement
- Reverberation time and clarity analysis
- Material recommendation for improvement
- Save, load, and export results
- Generate PDF reports with photos
- Tutorial slideshow for guidance
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APM Sweep is the successor of the well known APM Tool: it let you quickly measure the acoustical performance of a room (reverberation time, clarity, etc. in octave and third octave bands), check if that room is well suited for its purpose and, if not, choose which materials can improve the acoustical quality. Everything still there but with an exciting improvement: now you can use all the power of the Exponential Sine Sweep technique for the measurement process, so your results can be extremely precise and accurate. You can also, save, load and export results in common spreadsheet format. The app can also generate pdf reports with photos. A tutorial slideshow explains the app use. Required at least iOS 11.0
Bitbop
Create music with a pocket instrument where every pad is in key. Explore over 1,000 songs across various genres, customize sounds with five unique synthesizer worlds, and visualize your music with full-screen graphics. Share your creations as video, audio, or links.
- Pocket instrument with in-key pads
- 1,000+ song templates across genres
- Five distinct synthesizer sound worlds
- Full-screen music visualizations
- Export audio, MIDI, and video
- Real-time collaborative jamming
- Offline functionality
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Bitbop is a pocket instrument for making music. Every pad is in key, so you can't play a wrong note, and a full band plays along: lead, bass, bells and drums. START FROM 1,000+ SONGS Techno, house, trance, drum and bass, synthwave, lo-fi, hip-hop, disco, afrobeat, latin, raga, classical, folk and Bitbop originals. Load one, change anything, make it yours. Or tap Surprise me and start from a new idea. FIVE SOUND WORLDS Each one is its own synthesizer: - Bitbop: the signature chiptune sound, a PWM lead and a chip supersaw - Techno: a resonant lead, a clean sub and a driven kit - Retro: a pulse melody, square chimes and a smooth triangle bass - Classical: bowed strings and a plucked harp in a concert hall - Dancehall: a syncopated sub, a skank chop and a steppers riddim SOUND YOU CAN SEE 100 full-screen visuals that follow every note you hear. SHARE WHAT YOU MAKE - Export a video for stories and feeds, with the visuals you see - Export WAV audio or MIDI for any music app - Share a song as a link or QR code - Go Live: friends watch your jam in real time from a link, no app needed PLAY YOUR WAY - Tempo from 65 to 250 BPM, a vibe filter and a feel control for swing - Loops from 8 steps up to 10 bars, with a fader for lead, bass, bells and drums - Undo, erase, copy and paste, and lock a control between songs NO ADS. NO ACCOUNTS. Bitbop works offline and your songs stay on your device. Only anonymous usage counts are sent, and you can turn them off in Settings.
Screenshots
Verdict
The clearest difference is rating: Bitbop at 5.0 against APM Sweep's 1.0. Bitbop also leads on update cadence (weekly vs every 10 months). APM Sweep's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 18.0). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Bitbop holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
APM Sweep ships an update every 10 months, Bitbop weekly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | APM Sweep | Bitbop |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Every 10 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 35 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Lorenzo Rizzi | Franz Enzenhofer |
Customer experience
APM Sweep
Bitbop
In-app purchases
APM Sweep
No in-app purchases
Bitbop
No in-app purchases









