PolyHarp vs Moby Chip
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PolyHarp
This app offers a virtual musical instrument inspired by chorded zithers, featuring extensive chord customization, multi-string capabilities, and massive polyphony. It serves as a platform for harmonic theory exploration and a powerful MIDI controller, with numerous presets and the ability to create unique instruments.
- Extensive chord customization
- Multi-string and polyphony support
- Harmonic theory testbed
- MIDI controller functionality
- Large preset library
- Audiobus 3 and IAA support
Read full descriptionHide full description
PolyHarp is a virtual musical instrument and a thought experiment. It takes the basic idea of a chorded zither and extends it to large numbers of chord choices, made out of any kinds of intervals, multi-string courses, fretting, and massive polyphony. It's a testbed for harmonic theory as well as a great multi touch simulation of the good old "idiot zither" you have in the attic. PolyHarp can translate many of these innovations to MIDI and is a powerful MIDI controller. PolyHarp comes with a large number of presets, exploring many variants on stringed instruments, but its real power is its ability to build strange new chords, layouts, and controls into otherwise impossible instruments. PolyHarp supports Audiobus 3, including saving setups, and IAA.
Moby Chip
Create old-school 8-bit chiptune music with this four-track sequencer. Design custom sounds using wavetables or noise, and edit notes with detailed controls for instruments, effects, and timing. Export your creations in various formats for use in other applications or games.
- Four-track chiptune sequencer
- User-definable wavetable oscillators
- Random pitched noise for SFX
- Sample-based timing with accurate tempos
- Per-note editing of instrument, volume, glide, pan
- Multiple export formats (WAV, AAC, CAF, M4R)
- Live playing with onscreen keyboard
Read full descriptionHide full description
"Fantastic" - Obo Wurx "Instant buy!" - Marco Herrarte "It’s absolutely amazing. It’s perfect." - scooba17 "This is awesome. You've done an amazing job with this!" - Nico Reuel "I spent hours making music on my AMIGA, back in the day. Thanks for this APP." - alleykat "A masterpiece of its kind. - The complete package: sexy, smart, funny, and an excellent cook." - littlewoodg "Holy jeebus, I just found this app and it’s insane. It’s EXACTLY what I’ve been craving on iOS. Thank you thank you thank you!!!!!!!!!" - cenz music "Best chip app. - Is a great sounding, great looking, and great quality app. Everything is intuitive. Congratulations!!!!!! I’ll be telling everyone so know about this." - Always Don't Mess With Me Moby Chip is a four track, easy to use, chiptune, music sequencer. It was designed to recreate that old-school 8-bit video game sound. Each track is monophonic and generates sound from user definable, 4-bit 32 sample wavetables, or random pitched noise for drums and sound effects. The wavetable oscillators are bandlimited, using a proprietary algorithm, calculated in real time, and modeled somewhat after the original GameBoy’s wavetable channel. Moby Chip was design with professionals in mind. It’s great for creating chiptune songs or sound effects. It has sample based timing with accurate tempos. Export options include full song or phrase with selectable tracks and four file formats: wav, AAC/m4a, caf, ringtone/m4r. Exported audio files are ready to use without editing. Drop them into your favorite App such as Ableton Live, Apple Logic Pro X, or use them in a video game. These files can be accessed outside the Moby Chip App in the Apple Files App or accessed through iTunes File Sharing or in the Finder (MacOS 10.15 and newer). Moby Chip can be played live. Plunk out a tune on the onscreen keyboard with accompanying music provided by the Notes Grid (main screen) or the Song Editor. And like the music trackers of old, each note of each track can be individually edited. The instrument, octave, volume, glide (portamento), pan (including old-school delay stereo effect), arpeggiated chords, and trill effects, can all be adjusted per note. And one of my favorites, the Notes Grid supports triplets. You can find in-depth information in the included manual. But don’t let that keep you from jumping in and trying it out. Also, eight song examples are included in the app to learn from. Have a whale of a time!
Verdict
The clearest difference is price: PolyHarp at $4.99 against Moby Chip's $7.99. On rating, review sentiment, ratings volume and update cadence 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
PolyHarp costs $4.99 and Moby Chip $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
PolyHarp holds the better App Store score, 4.9 against 4.8. Both are backed by a comparable volume of ratings — 11 and 8 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
PolyHarp ships an update every 4 weeks, Moby Chip every 3 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | PolyHarp | Moby Chip |
|---|---|---|
| Price | $4.99 — better | $7.99 |
| Rating | 4.9 (11 ratings) — better | 4.8 (8 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 11 — better | 8 |
| Update frequency | Every 4 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPad | iPad |
| Requires iOS | 12.4 — better | 13.6 |
| Further details — not scored | ||
| Size | 16 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | Henry Lowengard | Binary Square, Inc. |
Customer experience
PolyHarp
Moby Chip
In-app purchases
PolyHarp
No in-app purchases
Moby Chip
No in-app purchases


