VAPolyMkII vs BPM Checker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VAPolyMkII
This virtual analog synthesizer offers a 16-voice bitimbral polyphonic sound engine with two distinct filter models and extensive modulation options. It includes a built-in sequencer, various effects, and supports AudioUnit Extension for integration with DAWs. Projects can be synced across iPhone, iPad, and Mac via iCloud.
- 16-voice bitimbral polyphonic synthesizer
- Two analog-modeled filter types
- Extensive modulation capabilities
- Built-in piano roll sequencer
- Multiple audio effects
- AudioUnit Extension (AUv3) support
- iCloud Drive project syncing
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VAPolyMkII is a virtual analog bitimbral polyphonic synthesizer for iPhone, iPad and Mac. It features 16 voice synthesizer, effects, sequencer and audio visualization tools. It operates as a stand alone or as an AudioUnit Extension (AUv3). Stand Alone supports Ableton Link, MIDI and audio file export. The synthesizer consists of two 8 voice synthesizer, which features two oscillators, two ADSR envelopes, resonant high pass and low pass filter and an amplifier per voice. The oscillators features continuously variable wave shape and wide variety of modulation. The filters are modeled on the Sallen-Key filter circuit and cascaded OTA filter circuit for classic analog sound. The Effects include delay, chorus, flanger, reverb, eq and compressor. The sequencer features piano roll and parameter automation editor to program 16 bar pattern per clip. Project files can be saved in iCloud Drive, so that the project can be accessed from iPhone, iPad or Mac. - Main Features - Virtual analog 16 voice bitimbral polyphonic synthesizer Two type of Lowpass filter, cascaded OTA model and Sallen-key model. Patch points for modulation. Support MIDI 2.0 New User Interface built by SwiftUI for improved performance. Built-in Sequencer. 16 bar patterns per clip. Total 8 clips. Piano Roll and Parameter automation. Support Audio Unit Extension (AUv3) Works on iPhone, iPad and Mac. Support iCloud Drive to share project files between the platforms. Audio Export. Linear PCM format (AIFF, WAV and CAF) and compressed format (AAC) Support Ableton Link, Bluetooth MIDI, MIDI In / Out. - System Requirements - A13 Fusion or above is recommended. AudioUnit Extension (AUv3) requires host application which support AudioUnit Extension. AudioUnit Extension is supported by Apple Logic and Apple Garage Band on iOS and macOS. For any other DAW, it depends on the application and some of them don’t support AudioUnit Extension.
BPM Checker
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Find the BPM of any song, instantly. BPM Checker listens to the music playing around you and tells you its tempo in beats per minute - no tapping along, no typing, no account. Just tap Listen and point your phone at the speaker. WHAT IT'S FOR - DJs matching and beatmatching tracks - Producers and musicians checking a reference tempo - Dancers and instructors finding the count of a song - Runners and gym-goers picking music at the right pace - Anyone curious how fast a track really is HOW IT WORKS Real-time detection runs entirely on your device using the microphone. Play a song out loud, tap Listen, and the tempo appears within a few seconds, with a confidence reading so you know how solid it is. PRIVATE BY DESIGN The audio is analysed live on your iPhone and is never recorded, saved, or sent anywhere. FREE BPM Checker is free, supported by a small banner ad. Note: because the app hears music through the microphone, it works best when the song plays out loud in the room, not through headphones.
Screenshots
Verdict
The clearest difference is price: BPM Checker at Free against VAPolyMkII's $14.99. VAPolyMkII's advantage is ads (none vs shown) and device support (3 vs 1). On in-app purchases and iOS requirement 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
BPM Checker is free to download; VAPolyMkII costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | VAPolyMkII | BPM Checker |
|---|---|---|
| Price | $14.99 | Free — better |
| Rating | 4.5 (11 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 11 — better | — |
| Update frequency | Weekly | — |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, Mac — better | iPhone |
| Requires iOS | 16.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 16 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Ryo Togawa | SIMONE PADOVANI |
In-app purchases
VAPolyMkII
No in-app purchases
BPM Checker
No in-app purchases









