Poly 2 vs King Key
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Poly 2
This app generates evolving musical patterns and melodies using polyrhythms. It offers extensive sound manipulation with a sampler, multiple effects, and the ability to store numerous configurations. Users can also import their own sounds and integrate with other music production tools.
- Generative polyrhythm sequencing
- Up to 8 simultaneous sounds
- Sampler with envelopes and filters
- Randomize capabilities
- Built-in delay, reverb, distortion, and EQ FX
- AUv3, Audiobus, and IAA support
- Import custom samples
Read full descriptionHide full description
Poly 2 is a generative sequencer that creates evolving patterns and melodies based on the power of polyrhythms. Check out the promo video: https://youtu.be/ovCXtBynEkw Features: - Up to 8 different sounds at any time - Store up to 16 different configurations for each project - A sampler that includes envelopes, filters, loop crossfading, an LFO and more - Randomise capabilities - Delay, reverb, distortion and EQ FX - Over 100 samples included for free - 13 premade collections of sounds - 13 example projects - AUv3 support, both MIDI and Audio - Audiobus and IAA - Ableton Link - MIDI notes in / out, MIDI CC in / out and MIDI clock in - Import your own samples via iOS Files or WIFI transfer
King Key
This app provides high-quality one-shot keyboard samples, including vintage typewriters and modern synthesizers. It offers 9 instruments and 11 presets, usable as a standalone instrument or an AUv3 plugin within music production hosts.
- High-quality one-shot keyboard samples
- Vintage typewriter and MIDI keyboard sounds
- 9 instruments and 11 presets
- AUv3 plugin compatibility
- Standalone instrument mode
- Proprietary high-detailed sampling techniques
Read full descriptionHide full description
In grand celebration of International Joke Day 2024, we at Caelum used our incredibly intelligent minds to bring you our first sampler; King Key. Gone are the days when you were left begging for high quality one-shot keyboard samples, now you can get King Key. Anywhere in the world you can now play the sounds of a keyboard, on your keyboard. We also blessed you with the sounds of a MIDI keyboard, a typewriter and 4 produced kits as our generosity knows no limits. Click, Clack, Svvvvt, B-ding, cha-cuh, fshhhh. With 9 instruments and 11 presets at your finger tips you can finally be the person your parents wanted you to be, a King Key one. Using proprietary high-detailed sampling techniques, which are sadly too complex for you to understand without demonstrative play-dough, we have captured the essence and spirit of a vintage Imperial typewriter, a Modal Cobalt8X and a Generic USB keyboard. We then took these beautiful, inspirational samples and produced them into some juicy, expressive kits for your pleasure. King Key is designed as an AUv3 plugin, meaning it works within iOS and iPadOS hosts such as Logic Pro, GarageBand, Cubasis 3, AUM and Beatmaker 3. King Key also works as a standalone instrument.
Screenshots
Verdict
The clearest difference is price: Poly 2 at Free against King Key's $1.99. Poly 2 also leads on ratings volume (686 vs 15). King Key's advantage is in-app purchases (none vs 1) and review sentiment (100% vs 84%). On rating, ads 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
Poly 2 is free to download; King Key costs $1.99 up front. Poly 2 sells 1 one-off in-app purchase. King Key asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.8 for Poly 2 against 4.9 for King Key. That said, the two scores are not equally well evidenced: Poly 2 has 686 ratings behind it against 15, so its average is the more settled of the two. Written reviews are what separate them: 84% of Poly 2's written reviews are positive against 100% of King Key's.
| Parameter | Poly 2 | King Key |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.8 (686 ratings) | 4.9 (15 ratings) — better |
| Positive reviews | 84.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 686 — better | 15 |
| Update frequency | Every 4 weeks | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 153 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | James Milton | Caelum Audio |
Customer experience
Poly 2
King Key
Bugs and requests
Poly 2
Reported bugs
3 issues- In-app purchase not working for some users
- MIDI connectivity issues with certain apps
- Crashes upon opening for some users
Requested features
8 requests- Ability to preview samples before importing
- Autoslice/autochop functionality for samples
- Support for larger sample imports and automatic slot filling
- Granulizer effect
- Note repeat and vinyl effects
Show 3 moreShow fewer
- More built-in effects and processing options
- Ability to create and arrange full songs
- M1 Mac compatibility
King Key
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Poly 2
- Pro mode$11.99
King Key
No in-app purchases









