Kalliopeia vs ARPJAM Studio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kalliopeia
Experience your music in stunning detail with this high-resolution audio player. It supports a wide range of formats, offers advanced upsampling capabilities, and includes a powerful 11-band equalizer to customize your sound. Enjoy gapless playback, playlist creation, and more.
- High-res audio playback (DSF, DSD, FLAC, WAV, AIFF, ALAC, AAC, MP3)
- Audio upsampling to 192kHz
- 11-band equalizer with presets
- Gapless playback
- Playlist creation and waitlist
- Last.fm scrobbling
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Kalliopeia is a high resolution music player app. Features: 1. High-res audio playback Supports up to 5.6MHz DSD and 384kHz PCM high-res audio. Capable of playing song synced to your iTunes. Compatible Formats - DSF / DIFF - FLAC - WAV / AIFF - ALAC(Apple Lossless) - AAC - MP3 * A device with a portable amp or other function that supports high resolution is required to output high-res audio at its original quality. Headphones plugged directly into a headphone jack will output at 44.1kHz or 48kHz. * To play DSD files, you need a DAC that supports DSD over PCM (DoP). 2. Converts standard audio files to high-res using upsampling Kalliopeia links to your connected device to provide upsampling and playback at up to 192kHz. * Kalliopeia has a fairly high CPU utilization rate, so your battery may drain faster when it is in use. 3. Built-in 11-band equalizer for bringing out that high-res power Built-in 32Hz~32000Hz 11-band equalizer. Use the 20 stock presets, or create and save your own settings. You can also assign settings for each musical genre. 4. Additional Features - Gapless Playback - Create playlists - Enter the next songs to listen to with "Play Waitlist" - Save your listening history (up to 20 songs) - Shuffle, repeat - Post what you are listening to on Twitter and other social networks - Override screen auto-lock during playback - The Last.fm Scrobbling feature
ARPJAM Studio
This app offers a generative synthesizer experience focused on sound design without requiring keyboard skills. It allows users to shape waveforms, filters, and effects in real-time as music plays, offering a unique approach to music creation for those who enjoy sound sculpting.
- Generative arpeggios with multiple waveforms
- Probability-based drum generation
- Chord progression locking
- Real-time XY pad parameter control
- Assignable LFOs for dynamic sound shaping
- Play pad for layering live input
- Preset saving and sharing
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No sequence. No play button needed. An instrument that keeps going without you programming anything. Two generative engines invent phrases endlessly inside the scale and chord you choose. What you shape is not a song — it is a way of sounding. Move a control and the sound changes shape without ever stopping. Density, contour, filter, tape movement. It is built so that nothing you touch can break it. And you can play it. On the key pad or from a MIDI keyboard, right on top of the stream it is generating. What you play can be captured into the looper. Now your own sound can go in too. Record a bar into SAMPLE, the fifth machine, and chopping it up and rearranging it is the app's job. ■ Generate • Two independent arpeggio engines (waveform, filter, envelope, effects) • Ten arpeggio types (including Fingerpick, fingerstyle guitar), chord progressions, ten time signatures • BASS — a bass machine of its own (STEP / COMPLEXITY / OMIT / PATTERN) • Drum machine • Six LFOs, XY pad, performance FX ■ Slice (SAMPLE) • Record one bar from a mic or line input, with count-in and click • Record the app itself (ARP A / ARP B / drums), and overdub onto it • Load audio files — and the audio from a video file • Up to 32 slices, ordered by the same rules as the arps: direction, reverse, octave, probability, groove • STRETCH (on by default) — change tempo without changing pitch • Its own filter, envelope and delay / reverb sends ■ Play • On-screen key pad — always in scale • MIDI keyboard input (damper pedal, pitch bend, standard control changes) • One-bar looper that records how hard you played ■ Sound • Piano — three velocity layers, stereo, damper release • Electric piano — harmonics shift with how hard you strike • Nylon-string guitar — synthesised with a physical string model • Marimba, kalimba, handpan and chime — struck instruments, measured from the real ones and synthesised • Waveforms (sine / triangle / saw / square) plus an acid filter • Delay, reverb, Glitch, Granular, overdrive • DRIFT / FLUTTER — tape movement on the synth voices and the live input alike • Concert pitch A=415–444 Hz ■ Connect • AUv3 plug-in — as an instrument and as an effect • Ableton Link, MIDI Clock, MIDI out (ARP A / ARP B / BASS / DRUMS), LFO as MIDI CC • External audio input (line / microphone) • WAV recording and export One-time purchase. No subscription.
Screenshots
Verdict
The clearest difference is review sentiment: ARPJAM Studio at 100% against Kalliopeia's 50%. ARPJAM Studio also leads on rating (5.0 vs 3.5) and update cadence (every 2 days vs every 2 months). Kalliopeia's advantage is price ($4.99 vs $12.99). On ads, in-app purchases and monetization model 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
Kalliopeia costs $4.99 and ARPJAM Studio $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ARPJAM Studio holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 2 and 6 respectively. Written reviews point the same way: 50% of Kalliopeia's written reviews are positive against 100% of ARPJAM Studio's.
Kalliopeia ships an update every 2 months, ARPJAM Studio every 2 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | Kalliopeia | ARPJAM Studio |
|---|---|---|
| Price | $4.99 — better | $12.99 |
| Rating | 3.5 (2 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 | 6 — better |
| Update frequency | Every 2 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 26.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 84 MB |
| Age rating | 4+ | 4+ |
| Developer | YU HASHIZUME | Takashi Tsunoda |
Customer experience
Kalliopeia
ARPJAM Studio
In-app purchases
Kalliopeia
No in-app purchases
ARPJAM Studio
No in-app purchases









