# SynthMaster One — user reviews > 206 indexed App Store user reviews of SynthMaster One by KV331 Audio, rated 4.70/5 from 740 ratings. - Source: https://appshunter.io/ios/app/synthmaster-one/id1254353266/reviews - App overview in markdown: https://appshunter.io/ios/app/synthmaster-one/id1254353266.md - Rating breakdown: 5★ 619 · 4★ 68 · 3★ 19 · 2★ 18 · 1★ 16 ## What do users think of SynthMaster One? Overall sentiment: positive **Pros** - 🚀 Powerful synth engine - 👍 Extensive preset library - 🎨 Versatile sound design capabilities - 💡 Free desktop version expansions on iPad - 🎹 Excellent sound quality and tone **Cons** - 🐛 Crashes and stability issues - 🔋 Battery drain in background - 🤔 Confusing in-app purchase system - 👎 UI/UX could use improvement - 🔇 Audio issues and no sound **Commonly reported bugs** - Stuck notes and MIDI issues - Preset loading crashes - Restore purchases not working - Incompatibility with certain DAWs **Most requested features** - Add custom wavetable support - Improve MIDI mapping and MPE functionality - Optimize performance on older devices - Streamline preset management and browsing ## Newest reviews (13 of 206) ### 4/5 — Good but *2026-03-07, version 1.15.16* Great synth except when I open it as a audio unit extension in garage band it won’t let me clear modulation off of presets pls fix ### 2/5 — Something changed, old projects sound different *2026-02-07, version 1.15.16* UGH! Happens way too often with iOS synths. Revisit an old project after a few years and the patches sound wrong. I give up. ### 4/5 — Sehr gut klingender Synth. Super Oberfläche. Ableton Link Brocken *2025-08-30* Ich schon vor langer Zeit die Entwickler darauf aufmerksam gemacht das Ableton Link nicht mehr funktioniert. Deshalb nur 4 Sterne ### 3/5 — With BACKGROUND off, the synth doesn’t sound at all *2025-08-21* Even when not un background, it’s completely muted. If one MUST keep the option enabled, ti hear any sound at all, why to put a BACKGROUND Setting? 🤷‍♂️ ### 2/5 — Underwhelmed and Overwhelmed *2024-10-17* First of all: In terms of Sound poissibilitys and experimenting this can be a great synth. Seems to be a workhorse, BUt: the UI is irritating at best. Way to much things are organized in a unintuitive way, it doesn't feel responsive in some/ many things, the way of modulations is somehow smart, but also can be really annoying. I get why people love it and whe people hate it. I'd love to love it but don't know if i got the nerves to use it besides a quick playaround, sadly ### 3/5 — プリセットした音が鳴らない *2024-03-03* 良いシンセサイザーアプリですが、2に比べると、プリセットした音源が鳴ってくれません。これでは使えませんので、もしバグならば、早速対応して下さるようにお願い致します。 ### 4/5 — Excellent sound, mediocre UI *2023-06-13, version 1.5.13* The built-in presets sound amazing. I also appreciate the ability to microtune the synth with scala files. UI needs some work, but it’s rather usable for browsing the presets and making small adjustments. I wouldn’t want to design my own patches from scratch with that UI on a touchscreen though - sounds like a PITA. ### 4/5 — Можно ли убрать купленные наборы звуков ? *2023-05-25, version 1.5.13* У вас в Synthmaster все прекрасно настроено ! Купленные наборы исчезают в покупках , и второй не загрузишь не купишь . Здесь сколько раз ни покупай не восстанавливай они все равно есть в покупках в наборах и предложениях … Если купил набор звуков : можно ли сделать дешевле уже покупку сборника звуков ,,?! В synthmaster я по отдельности купил Pop наборы 1-2-3-4 а вы мне предлагаете купить их теперь набором ../ ну как-то несерьезно . По ошибке кто-то может купить два раза одно и то же ! Вопрос зачем ..,? Программа же видит что у меня уже куплено и что установлено в программе … смысл два раза ?₽ ) вам то конечно выгодно продавать одно и тоже ### 5/5 — One of, if not, the original best synths *2023-03-12* You can’t find anything better, but only as good. Beepstreet comes to mind with Zeeon and Drambo, and that’s where I use this most. Great sounds and a lot of modular ability. ### 5/5 — Could you tell me *2023-02-11* Please where can I find the sound „Neon Shine“? Shall I buy something? Thanks for an answer. **Developer response:** Hello, “neon shine” is a preset from the Desktop factory presets. You can get it by purchasing the “Desktop presets upgrade” in-app purchase ### 5/5 — The Bad Reviewers Are Accusing This and Trying it to get it GROUCH-RATED! *2023-01-15, version 1.5.10* I’m saving the app from the bad reviewers who are accusing that app!! Since the bad reviewers are absolutely out of their freaking minds! Thinking that everything in pop culture was hiding problems and subliminal messages in them. So they went on the internet accusing songs, accusing toys, accusing movies of promoting subliminal warship and it was “The Good Killer” and no one was safe from the Good Killer. ### 5/5 — Great synth, IAP confusing *2022-12-19, version 1.5.10* When using browse button and then the store, there’s a bug that won’t allow to restore IAP. It can only be done from the name of the current preset (top center of screen) ### 5/5 — Sound ok / Gui fails *2022-12-11* Der Sound ist ok. 2 gravierende Probleme die die App für mich unbrauchbar machen sind 1. die fehlende Einstellungsmöglichkeiten für Mastervolume ( die App bläst einem im Vergleich zu vielen anderen Apps fast die Ohren weg). 2. Patches lassen sich nicht einzeln löschen. Durch ausgiebige Recherche im Netz musste ich dann feststellen, dass diese Punkte schon vor längerer Zeit mehrfach beanstandet wurden, aber auch beim derzeitigen Softwarestand keine Besserung durch den Anbieter erfolgte. ## Most critical reviews (10 lowest-rated) ### 1/5 — No audio *2025-09-21, version 1.15.16* Can’t for the life of me work out how to get sound ### 1/5 — No sound *2025-04-13, version 1.15.16* I no longer get any audio!? No sound at all. Not sure if an o/s update broke things, but it needs fixing! ### 1/5 — No sound *2024-10-27, version 1.5.15* Please fix standalone, iPhone 12 mini ### 1/5 — Urgent *2024-05-26* Pas de son iPad Pro 10.5 iOS 17.5 ### 1/5 — Pls fix it *2024-04-14, version 1.5.15* I cant do anything when i open the app ### 1/5 — Too many bug *2023-06-18, version 1.5.13* Too many bug ### 1/5 — Way too expensive for what it's worth *2023-06-08* The sound is good. Presets are okay. Maybe I can find something that fits. On one part the ui is not that bad as every setting fits somehow. But stillt ui on the iPhone is crap. Especially in auv3 mode. In the menu are some settings cut so you cannot change somethings inside. For that you have to open the app. Same as with the synthmaster player. Seems like they cannot make it better. Lagrange feels more mature and way better and is 12€ cheaper. ### 1/5 — Synth is great *2022-11-27, version 1.5.10* But the iap are confusing some are double and the same patch, I bought the bundle it says 14 expansions but only came with ten and I bought the desktop bundle and still missing expansions ?? Also restore iap feature does not work ? Love the synth though just paid iap are a hassle with this app ### 1/5 — Won’t load anymore *2022-11-25, version 1.5.10* I thought this was great. But now it won’t load on iPad or iPhone at all. Does not work anymore. ### 1/5 — Huge background battery drain on iOS 16.1.1!!! *2022-11-18, version 1.5.10* I had over 12 hours of background activity!! And It was draining my battery so much. Please fix this because I had to delete this app. ## Most praised reviews (10 highest-rated) ### 5/5 — Nicht nur auf dem iPad sehr gut *2026-04-23* Ist auf meinem iPad Setup Number One so ein toll klingender Synthi mit einem super Arp und 2500 Presets in der Vollaustattung findet man nirgends. Bitte Updates und pflegen weiterhin. Ein x/y Pad wie im Player würde ich mir noch wünschen. ### 5/5 — AUv3 scheint vorhanden, geht bei mir nicht *2025-12-24* Ich finde es klasse, dass diese App als Universal veröffentlicht wurde. Auf meinem Mac läuft sie in Logic. Auf dem iPad wird sie nicht angezeigt. Ist für mich nicht so gut, da ich oft Ideen zuerst auf dem iPad festhalte und dann irgendwann auf Mac wechsle. Die vielen SynthMaster Versionen sind auch etwas verwirrend. Keine Ahnung, welcher Content auf welcher Version läuft. Korrektur: Ist ein Namensproblem. Tritt in Logic iPad unter k331 als Hersteller auf statt KV331. ### 5/5 — Got all my desktop extensions on iPad! *2025-12-14, version 1.15.16* I got the desktop SynthMaster One free this December, and all the expansions for only $39. Then bought the iPad SynthMaster One for $4 and registered using my desktop serial number. Instantly got all the desktop goodies on my iPad without having to pay again. That’s how all desktop/IOS developers should do it! ### 5/5 — Consumers are dumb *2025-11-11, version 1.15.16* Just here to balance the rating because I hate unfair 1-star reviews ### 5/5 — Superb! *2025-05-03, version 1.15.16* Very good quality synth engine. Can do vintage analog very well and cutting edge modern stuff very well also! Can’t wait for SM3 for iOS!!! ### 5/5 — Bugs have finally been fixed! *2024-02-03, version 1.5.15* Finally I can enjoy this great synth. I actually prefer it to synthmaster2 as the interface is more user friendly, even though the wavetable content is not as extensive. ### 5/5 — Can you please fix the keys problem?😌 *2023-10-24* I want to ask if you can fix the little keys on the app because every time I put it on hold or long tone mode, it’s just like cutting off on each of the keys. I’m not complaining! I’m just asking if you can fix it please. I need to get a response from you. ### 5/5 — Thanks for helping me imitate the closeness of me being in band class at school!😊❤️ *2023-07-23* I love that you made the synthesizer have the imitation of closeness of me being in band class at my school! It can make me feel that my band teacher is nearby. It also imitates my trumpet that I play during concerts at my school. I love using the SynthMaster One synthesizer that I can transpose to the key of Bb. Mostly important for band. I can play any song I want. I can even play while my band teacher is away now. I would thank you for making the synthesizer imitate the closeness of me being in band at my school! I would really appreciate it!😊❤️ ### 5/5 — Wonderful! *2023-07-14, version 1.5.13* One of the best synth apps for iPad.. I love it..thank you. ### 5/5 — IMPORT/EXPORT MIDI MAPPINGS FIXED👍 *2023-07-03, version 1.5.13* IpadOS16.5.1 update has fixed the issues listed below. All is excellent with both SM1&2 👍 31st MAY The Menu/Import/Export Midi Mappings does not work at all! Every single parameter that is assigned to a control has to be manually assigned every time the app is launched because ALL Midi Learn Mappings are instantly lost when closing the app, SM1 only exports a blank document. 25th FEB This app has a brilliant sound but unfortunately it is so unreliable when it comes to Midi Learn….it constantly forgets what it has learned, same as SM2. Money not well spent I’m afraid ☹️ 9th Nov. SYNTHMASTER 1 & 2 iOS are the best synths ever, grab it whilst it is free until end of November, I can assure you you won’t regret it. I’ve had this app nearly 2 years and there is still loads of brilliant features I haven’t even looked at yet 👌no chance of ever being bored with SYNTHMASTER. 1 Year ago. Synthmaster One is one of my main synths that is used in all my Cubasis3 projects, it has many beautiful sounding lead and pad presets. I use many Au3 instances of both SMO & SM2 on my iPad Air 4 with no problems. I hope fadeamiga manages to sort out his sound glitch problem, may I suggest turning off “Background Audio” in SMO Settings, that worked for me, I almost returned my iPad thinking it was faulty! --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-31.*