# TB Flowtones — Virtual analog synthesizer > Virtual analog synthesizer app and AUv3 plugin with true VA synthesis engine. (iPhone/iPad app by ToneBoosters.) - Source: https://appshunter.io/ios/app/tb-flowtones/id1576472437 (this page in markdown: same URL + `.md`) - Developer: [ToneBoosters](https://appshunter.io/developer/1472446500) - Category: Music, Entertainment - Price: $9.99 - Rating: 4.70/5 from 39 App Store ratings · 34 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 17 MB - Released: 2021-08-10 - Data updated: 2026-09-03 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/tb-flowtones/id1576472437/reviews.md ## What is TB Flowtones? TB Flowtones Virtual Analog Synthesizer app and AUv3 plug-in Thanks to it's true VA synthesis engine, the use of analog-modelled non-linear filters and extensive modulation options, Flowtones sounds warmer and more analog than digital romplers and wavetable-based synths. TB Flowtones comes as stand-alone app as well as AUv3 plugin. True virtual analog synthesis features: - 4 VCO architecture (two voice layers with two VCOs each) - 4 synthesis engine types, in part modelled after famous analog synthesisers - 36 analog VCO waveforms featuring all classic waveforms and more - All VCO waveforms support pulse width modulation - Full stereo and mono unison modes for each VCO independently - Noise and subharmonic oscillators for each VCO - Unique ring and self-modulation matrix - High-quality, warm, non-linear filters (VCF) with over 30 filter types, including unique multi-resonance filters Modulation features: - Four LFOs with 30 waveforms each - LFOs can modulate other LFOs, including themselves! - Three additional envelope generators, with key velocity modulation - Quick access to modulation strengths through context menus - Hundreds of modulation signal paths available - LFOs can produce noise as waveform to randomly modulate other parameters; for example to simulate slight variations in analog filter parameters as they happen in analog circuits. Pro-grade effects - Studio-quality reverb, delay, and chorus effects - Unique formant filter to add vocal character - Analog and digital distortion / bit crushing effects - Master equaliser and peak limiter for final touch - Non-linear power supply simulation for authentic interaction between notes Step sequencer - Fully integrated, intuitive step sequencer - Can trigger chords and note series / phrases - Can run asynchronously or synchronously to the host - Smart copy/paste of note series to improve workflow - Smart zoom: edit fine details while keeping an overview over the full sequence Presets and intelligent randomizer - Flowtones comes with hundreds of presets to spark your creativity - Intelligent randomizer to explore endless sound synthesis possibilities What you should know: - Licenses acquired for this platform are not compatible with other platforms. - Audio Unit (AUv3) extensions require an iPad mini 2, iPad 4 or later models. ## Key features - True virtual analog synthesis engine - Analog-modelled non-linear filters - Extensive modulation options - Pro-grade studio effects - Integrated step sequencer - Hundreds of presets and intelligent randomizer ## Chart rankings - #191 in Top Paid · Music (US App Store) ## Recent user reviews (10 of 34) All indexed reviews: https://appshunter.io/ios/app/tb-flowtones/id1576472437/reviews.md ### 3/5 — Ever get fixed *2026-01-08* Own this n the other here and android but here they never stop running kills battery health and all have they been fixed ??? ### 5/5 — Great on android *2025-10-22* Has gotten better or I just learned sum tricks lol dude ran all night again 14 hours plus please update flow n low tones so we can manually stop them from running in background. Crazy they will run when not even used. That or guess I have to delete n re install when I want to use them smh cuz they literally two of my fav plugins ### 5/5 — Great on android *2025-10-17* Has gotten better or I just learned sum tricks lol ### 3/5 — Great on android *2025-10-12* Since they day I bought on iPhone we’re I more need them they run when the want and all night long every night even tried low battery mode last night with all app background refresh off always is Flowtones and low tones no place to be found? So they do as they please going to ruins my battery even if I don’t open them? So 2 hours on screen n 24 background deleting and re adding but it’s literally taking my batteries life away I lost a whole percent of battery life cuz this not charge battery life ### 4/5 — Not showing up in App Lists *2025-10-09* Edit, Today working fine will have to see next time i forget to plug in at night but was full charged n that never happens but two apps running all night will oops spoke to soon both running for past two plus hours in background they just stay running lol App is great would of got 5 stars from android to here but on iPhone it and Lowtone just ran all night and killed my battery why? And why do they not show up with all other apps to turn off app background refresh??? It’s like they don’t even exist on my phone but they work 5 stars on android has a bug or sum in them here. Don’t get it twisted I love Lowtones n Flowtones I just never seen sum run 13 hours straight both. While I was asleep n went to bed with 100 percent battery and wake up and it’s dead. N yes battery still good in the 90%plus range of health. If I figure it out and don’t have to keep them deleted until I wanna use ‘‘em on iPhone deadazz 5 star apps ### 1/5 — PRESET LIST IS NONSENSE, SUPPORT request impenetrable. *2025-08-22* Weird, first I wouldn’t ask for support here if your support page online worked, but it doesn’t. It kept saying I have to ‘match the format’ in various fields. Thus, iPadOS is not acceptable…and then once that was conquered, it just refused to upload my support request…anyway, great synth, wonderful, overshadowed by me being unable to backtrack through the presets - i can only right-arrow forward through the list, there’s no left arrow! Using standalone, not life or death but offputting is all. If I tap on the preset name now, it lists a dialogue box with eg ‘01 Airy’ at the top, then the next in the list downward is ‘02 Default’ and all the rest just keep incrementing until it gets to 015 and every single one has the name default. If I try going forward arrow, it might change behaviour slightly. Down to one star because this isn’t workable as it is, and the support request system doesn’t work online in any meaningful or effective way. ToneBoosters are therefore getting no complaints or feedback, and must assume all is well. Oh dear. ### 4/5 — Can’t move backward through presets *2025-07-02, version 1.6.3* Weird, first I wouldn’t ask for support here if your support page online worked, but it doesn’t. It kept saying I have to ‘match the format’ in various fields. Thus, iPadOS is not acceptable…and then once that was conquered, it just refused to upload my support request…anyway, great synth, wonderful, overshadowed by me being unable to backtrack through the presets - i can only right-arrow forward through the list, there’s no left arrow! Using standalone, not life or death but offputting is all. ### 5/5 — Amazing *2025-05-19* One of the absolute best synths that I keep coming back to over and over. Great sound, interface, and features for sound designers and people who want to learn also. Highly recommended ### 5/5 — Rawkt dermaßen *2025-04-24* Einfach nur schön, was man aus dem toneboosters Synthi rausbekommt. Wenn euch eine kleine Flaute ereilt ist der Randomizer einfach genial, aber auch in anderen Fällen ### 5/5 — Still relevant. Cuts in any mix 👍 *2025-04-01, version 1.5.9* Can’t believe it’s taken me so long to find this AU. Just a waft through the presets reveal the range and features of this powerful synth. It’s going to be great fun in any genre. Bought one for me, and one for my friend! Wishlist; could it read the midi Devices on the Ipad, just like Cubasis does - rather than just basic midi channel over all devices. Thank you Still gets 5* ## Frequently asked questions about TB Flowtones ### What is TB Flowtones? TB Flowtones is a virtual analog synthesizer app and AUv3 plugin that utilizes a true VA synthesis engine. It is designed to produce warm, analog-sounding audio through analog-modelled non-linear filters and extensive modulation capabilities. ### What are the key synthesis features? It features a 4 VCO architecture with two voice layers, each containing two VCOs. You can choose from 4 synthesis engine types, utilize 36 analog VCO waveforms with pulse width modulation, and employ full stereo and mono unison modes for each VCO independently. It also includes noise and subharmonic oscillators, a unique ring and self-modulation matrix, and high-quality non-linear filters with over 30 types. ### How much does TB Flowtones cost? TB Flowtones is a paid application. Licenses acquired for one platform are not compatible with other platforms. ### What are the system requirements for the AUv3 plugin? The Audio Unit (AUv3) extensions require an iPad mini 2, iPad 4, or later models. This ensures optimal performance and compatibility for the advanced features of the plugin. ### What kind of effects are included? The app includes pro-grade effects such as studio-quality reverb, delay, and chorus. It also features a unique formant filter for vocal character, analog and digital distortion/bit crushing effects, a master equalizer, and a peak limiter for final mastering touches. A non-linear power supply simulation is also included for authentic interaction between notes. ## Version history (last 5 releases) ### 1.6.8 — 2026-05-28 This update provides significant workflow, customisation, personalisation and performance improvements: - new MIDI learn functionality - Improved UI performance and reduced CPU load - Improved detection of drag vs click/tap logic for UI elements - Fix an issue with manual entry of automation lane values in certain hosts - New option to enable/disable GPU refresh throttling / high frame rate rendering - New option to enable highlighting of UI elements that accept keyboard input - New option to customize color scheme - Improved undo/redo functionality ### 1.6.7 — 2025-09-29 Stability and efficiency improvements ### 1.6.6 — 2025-09-21 Stability, compatibility and efficiency improvements ### 1.6.4 — 2025-07-02 Stability and efficiency improvements ### 1.6.3 — 2025-04-14 New feature: 16 active program slots that can be changed using MIDI program messages ## Apps similar to TB Flowtones | App | Rating | Price | Category | | --- | --- | --- | --- | | [Sunrizer synth](https://appshunter.io/ios/app/sunrizer-synth/id443663267) | 4.7 (183) | $12.99 | Music | | [NERD Synth A2x + AUv3](https://appshunter.io/ios/app/nerd-synth-a2x-plus-auv3/id6478898564) | 4.9 (1,342) | $5.99 | Music | | [AudioKit Synth One Synthesizer](https://appshunter.io/ios/app/audiokit-synth-one-synthesizer/id1371050497) | 4.9 (26,818) | Free | Music | | [Zeeon synth](https://appshunter.io/ios/app/zeeon-synth/id1230960440) | 4.8 (209) | $14.99 | Music | | [Mersenne - AUv3 Plug-in Synth](https://appshunter.io/ios/app/mersenne-auv3-plug-in-synth/id1084197093) | 4.7 (28) | $8.00 | Music | | [Lorentz - AUv3 Plug-in Synth](https://appshunter.io/ios/app/lorentz-auv3-plug-in-synth/id1016055431) | 4.8 (24) | $8.00 | Music | ## More apps by ToneBoosters - [TB Equalizer](https://appshunter.io/ios/app/tb-equalizer/id1473111210) - [TB Reverb](https://appshunter.io/ios/app/tb-reverb/id1474944185) - [TB Barricade](https://appshunter.io/ios/app/tb-barricade/id1480150563) - [TB ReelBus](https://appshunter.io/ios/app/tb-reelbus/id1482450479) - [TB Enhancer](https://appshunter.io/ios/app/tb-enhancer/id1484449791) - [TB Morphit](https://appshunter.io/ios/app/tb-morphit/id1487595036) All apps by ToneBoosters: https://appshunter.io/developer/1472446500 --- *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 2026-09-03.*