Quick verdict
- What it is
- Store information collected; independent summary not yet available.
- At a glance
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- Free to download
Categories and search queries
Official categories
- Music
- Education
AppCorpus categories
Key functions
| Function | Availability | Access | Scope | Evidence |
|---|---|---|---|---|
| Free app | Yes | Free | — | Store published |
Screens
App Store
12 store screenshots
Pricing & paywalls
App Store
- Free
Ratings & reviews
App Store
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5/55 Star app, but a problem
I got this app last year around June or July, it was working completely fine. No problems or anything until recently a couple months ago. Everytime I try to open up the Auv3 extention on Garageband, it would always give me an error “Audio unit extention has quit” or something something like that. I even restarted my phone, it did not work. I even deleted and reinstalled the app hoping it would work, it only worked for a little bit, but unfortunately that wasn’t the solution. I tried smaller things such as opening the app before adding the extention on Garageband. No matter what I do, it doesn’t seem to work. All of my other extentions work fine and have no problems at all other than your app. Please fix this problem if you’re able to 🙏. Thank you.
GioisAMonkey · 31 Jul 2026
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5/5Absolute Ingenious App!!
I can't thank you enough for fulfilling this dream of mine to make music from my soul. You all did such a wonderful job to reach deep into time and space in creating this for all music producers and enthusiasts. This is enhancing my dreams into becoming reality. No words but completely in awe of the surreal feelings when I create such meticulous sound layers in building tracks. This is almost like using the electrode Korg which I had a great experience using while learning the trades of production. This is similar to apps I've used but with more advanced modifications and tweaks. I love this app and I use it either on my iPad or my iPhone. This by far surpasses the endless possibilities of original production. ;);) you are beautiful souls who've made a difference in my life. Music is better with this invention.
MHM111119 · 31 Jul 2026
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5/5I feel like I’m back in the 80’s!!! Amazing!!!
When I heard that this app was being released, I had very high hopes for it. This app/synth did NOT disappoint. I’ve been working with it, for about two hours, and I’m hearing all of the sounds that I grew up with. (I was a teen, in the 80’s, and this was my music!) For instance, the preset “DX Bass 1’ is the exact bass, used for the song “Danger Zone”. As soon as you hear it, you’ll instantly recognize it. There’s just so many iconic sounds!!! If you’ve ever wanted a DX7, like I have, and didn’t want to pay collector’s prices for one… Now, you can!!! You may be asking yourself, “How can an app, this true to the synths, that it’s trying to emulate, be free?” Because of the immense generosity of Analog Matthew. If you enjoy this app, please review it, and leave him some kind words!
Nettle Creek 68 · 31 Jul 2026
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5/5Update firmware please
Glitch or bug in program where I’m unable to sync other applicators towards keyboard synthesizer. Before I had no issues in sharing applications simultaneously to create unique vibes or even samples. Crashes upon activation of program, not sure if program is equipped to work with other applicators or just only meant for specific ones when it comes to content creations. Aside from that it has been a great tool and add on for on-the-go use or just simply working from home. The extensive amount of features are overwhelming but in a good way. Many viable options that would suite your needs and make your creations even much more unique. Perfect for all sorts from protégés to advance professionals. Hope new sounds would be introduced in the near future.
A. Uzi · 31 Jul 2026
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5/5about the King of FM app
I'm 71 years old and still own an original Yamaha DX7 which I occasionally use as a sound module with my MOXF8. I have installed this app on my iPad, connected it to my MOXF with a Roland UM-ONE, ran the Ipad 4 audio out back into the MOXF A/D in (using the MOXF's built-in effects routed to the A/D in), and disabled FM KING's effects (which slow midi response slightly) and now have a great Ipad sound module for layering the classic FM tines sound with my piano for live performance and recording. Now to figure out how to disable midi program changes . . Great Job Audiokit and King of FM!
aygkivdkh44444;,.! · 31 Jul 2026
Privacy & accessibility
App Store
Privacy
- Data Not Collected Developer declared
Accessibility
No accessibility labels collected yet.
Versions
App Store
- 1.0
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1.0.1
Thanks Everyone! + Now includes a new FREE Preset bank by Da Fingaz + Various bug fixes and improvements Post your music with the app. Tag me, I want to hear it! - AnalogMatthew
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1.1
Thanks everyone! More free sounds now: + NEW Preset Bank by Brice Beasley + NEW Preset Bank by Jade Starr + Various improvements & fix MIDI learn reset
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1.1.1
+ THANKS! + Another NEW FREE Preset Bank (by Sound of Israel) + Optimizations for Logic for iPad (did you know this app works as an audio unit plug-in on iOS for GarageBand, Logic, AUM, and other DAWs and hosts? Plug-in is also included free!)
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1.2
Thanks everyone! + Sequencer snaps to downbeat in AUv3 hosts (AUM, Loopy Pro, GarageBand, Logic, etc) for rock solid timing + 80s Distortion now supports stereo + More updates and fixes for you :)
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1.2.1
Thanks everyone! Lots of little fixes and updates in this version + Plus better sequencer support in Logic & GarageBand If you feel a sequence is "off beat" in an AUv3 Host while it's playing, make sure and check the "Rate" knob on the Sequencer panel to make sure it's not on a dotted beat. For example turn it to "1/8" or "1/16" instead of "1/8 D" or "1/16 D" Hope that helps!
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1.2.2
Thanks Everyone! By Request: You can now turn off/on the animation on presets panel by tapping on the animated character on the "Info Tab" Plus, various improvements to how the app runs in Logic for iPad More updates to come!
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1.3
THANKS EVERYONE! ++ NEW "Search" functionality for preset searching. Search button on preset panel. Thanks Gavinski ++ Fixes some random sequencer speed up issues in Hosts ++ Several other little improvements Feel free to post your music and tag @analogMatthew We want to hear it!
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1.4
THANKS EVERYONE! ++ Big Update! ++ + NEW: Analog Filter Code (if you like this, you'll LOVE the King of Bass Filter) + BY POPULAR DEMAND: Last used preset loads in Standalone when you launch + RECORDING Mode: Sequencer timing starts with record (no more dead space before recording) + Glide works in Poly mode. In Mono mode it is "Legato" style, meaning you have to have another note pressed for it to Glide + FIX: Standalone Seq timing when on & changing rate knob +++ THANKS EVERYONE _ MORE UPDATES TO COME! +++
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1.4.1
THANKS EVERYONE! ++ Updates for latest iOS version. ++ I'm excited to announce our latest app: KING OF DIGITAL If you enjoy King of FM and want to grab this amazing new app, we appreciate your support. People seem to really love it! Thanks again, Analog Matthew
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1.4.2
Thanks everyone! Lots of cool updates: * SEQUENCER Improvements: + Standalone re-starts immediately on key press (after all keys have been released) + Other sequencer improvements in both AU & Standalone * Settings: MIDI Channel In on Standalone now works for Pitch Wheel, etc ++ Plus, More little fixes and updates! ++
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1.5
Thanks everyone! Lots of improvements • Limiter can now be bypassed completely if you turn knob all the way off • Keyboard on iPhone can now expand to the full screen. Perfect if you've got clumsy fingers like me • Fixed Sequencer weirdness while in AUv3 mode with transport off • Optimized the code & gfx, saves 10mb of storage on your device! • Added "Panic" button to AUv3 in top right. Tap that if you get a hanging note • More small usability improvements! -- Analog Matthew :)
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1.6
Thanks Everyone! ** NEW: Expressive Keys bank – Beautiful & Emotional versions of the original DX7 E Piano & DX7II Full Tines. Uses a new algorithm for an expressive full 20+ layers of velocity, for the most REALISTIC playing experience ever Best with a MIDI Keyboard. All this, without adding any additional storage space!!! ** Plus, other fixes and enhancements Your friend, – Analog Matthew
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1.7
∙ New free Preset bank from oddSTAR ∙ Double-tap knobs to instantly reset to their last saved preset value ∙ On-screen keys now work correctly with certain MIDI controllers ∙ ADSR Sustain knobs now update in real time ∙ Improved stability when using third-party arpeggiators and sequencers
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1.7.1
Quick Fixes & Updates. King of FM will always be free, never any Subscriptions! Plus, by popular demand: copy preset will now automatically duplicate to User bank
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1.7.2
Thanks Everyone! King of FM will always be FREE! ++ Update Fixes iPhone AUv3 crashes on load ++ More subtle improvements and fixes
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1.8
Thanks, everyone! Stability Upgrades + New Features: • MIDI Program Change added to AUv3. App now responds to MIDI Program Change in hosts like AUM. • Close button added to the Bluetooth MIDI Keyboard popup (especially useful on iPhone). • Were you having crashes on standalone during load? This version should fix! • Fixes "Favorites" not saving for some Users • Fixes crashes for those changing presets in Loopy Pro while sending MIDI • Many more little fixes & improvements! More updates coming soon. Thanks!
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1.8.1
Thanks Everyone, Big stability improvements! • Fixes crashes on launch some users were experiencing • Fixes Ableton Link related crashes MORE FREE UPDATES TO COME!
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1.8.2
Thanks Everyone! • Improved Timing: ++ MIDI Clock Input added to Standalone Mode ++ Arps & Sequencer in Cubasis starts on first Beat MORE UPDATES COMING SOON! :)
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1.8.3
Thanks everyone! Quick fixes & updates for AUv3 LFOs!
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1.8.4
THANKS EVERYONE! • NEW: MIDI Clock In can now be toggled off Tap the Tempo readout to turn MIDI Clock In on/off NOTE: Tempo readout turns green when MIDI Clock is controlling it • iPhone AU View improvements • Fixes sequence sound cutting out while scrolling presets MORE FREE UPDATES TO COME! BETTER & BETTER!
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1.8.5
Thanks! Quick fixes and updates This app will get better and better!
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1.9
· 17 Jul 2026
Thanks Everyone! FREE UPGRADE: • NEW: MICROTONALITY Explore new sonic territory with 150+ curated microtonal scales, including North Indian scales, Hexanies, and scales by Irv Wilson, Marcus Hobbs, and more. • Import Scala .scl tuning files and bring your own custom scales into the app. • NEW: WORLD SCALES Explore 60+ international scales with selectable root keys. Choose from Arabic, Egyptian, Eastern, and other world scales, then pick the base key that fits your song. • NEW: WESTERN KEY + SCALE SUPPORT Choose a key like C minor, Bb, F minor, and more. Select from Major, Minor, Blues, Pentatonic, and other familiar scales. Keep your arps, sequences, and external MIDI locked to a Western scale, world scale, or go fully microtonal. • NEW: PRESETS SAVE THEIR KEY AND SCALE Want Preset #17 to always load in D minor? Now it will. Save presets with the correct key and scale for songs, live sets, and performance patches. • NEW: AUv3 STATE SAVING FOR TUNING AND SCALE Your tuning and scale settings are now saved properly inside AUv3 sessions. • NEW: TUNE LOCK Tune Lock button starts unlocked, so presets can load with their saved tuning. Tap the lock icon to keep the same tuning while changing presets. • NEW: PROGRAM CHANGE MIDI MAPPING You can now use a custom MIDI CC to change presets. Go to the About Page [i], tap “MIDI Mapping,” then “Add/Edit Mapping.” Choose “Program Change,” then enter the CC you want to use. PLUS: More improvements under the hood. This is a big leap forward Thanks for supporting the app, Analog Matthew
Alternatives
- VHS Synth | 80s Synthwave — Same category + similar ratings
Availability by market
- US
Data quality & evidence
- Page completeness
- Live store listing
- Last verified
- 31 Jul 2026
- Sources
- App Store
- Independent summary has not been published yet.