# Deep Synth vs King Key

The clearest difference is review sentiment: King Key at 100% against Deep Synth's 50%. King Key also leads on rating (4.9 vs 4.0) and price ($1.99 vs $4.99). Deep Synth's advantage is iOS requirement (10.0 vs 12.0). On ads, in-app purchases, monetization model and device support there is nothing between them.

Deep Synth costs $4.99 and King Key $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

King Key holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: King Key has 15 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 50% of Deep Synth's written reviews are positive against 100% of King Key's.

## The numbers

| Metric | Deep Synth | King Key |
| --- | --- | --- |
| Price | $4.99 | **$1.99** |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/deep-synth-fm-synthesizer/id1203273984/reviews) | **[4.9 (15 ratings)](https://appshunter.io/ios/app/king-key/id6504887055/reviews)** |
| Number of ratings | 2 | **15** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Paid | Paid |
| Size | 9 MB | 12 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aleksandar Mlazev](https://appshunter.io/developer/1093798140) | [Caelum Audio Ltd](https://appshunter.io/developer/1463219587) |

## What reviewers say

### Deep Synth

[App page](https://appshunter.io/ios/app/deep-synth-fm-synthesizer/id1203273984)

Create unique sounds with this FM synthesizer app. It features real-time wave manipulation, multiple sound effects, and MIDI keyboard support. Explore dynamic sound design with its intuitive interface.

**Highlights:** Real-time wave form editing, Simple envelope filter, Reverb and tremolo effects, Polyphonic keyboard with 5 octaves, MIDI keyboard support, AUV3 Audio Unit instrument

**In-app purchases:** none


### King Key

[App page](https://appshunter.io/ios/app/king-key/id6504887055)

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.

**Highlights:** 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

**In-app purchases:** none


## Frequently asked questions

### Is Deep Synth free?

Deep Synth costs $4.99, with no in-app purchases.

### Is King Key free?

King Key costs $1.99, with no in-app purchases.

### Which has better reviews, Deep Synth or King Key?

King Key is rated higher. Deep Synth averages 4.0 out of 5 from 2 ratings, while King Key averages 4.9 from 15 ratings.

### Do Deep Synth or King Key have ads?

Neither Deep Synth nor King Key shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*