TB Flowtones vs Qithesizer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TB Flowtones
This virtual analog synthesizer app offers a true VA synthesis engine with analog-modeled filters and extensive modulation options. Create warm, analog-sounding music with a powerful architecture, diverse waveforms, and pro-grade effects. It also includes an integrated step sequencer and hundreds of presets.
- 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
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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.
Qithesizer
This advanced music synthesizer combines virtual analog, wavetable, and physical modeling sound engines. It offers extensive modulation capabilities, a built-in sequencer, and on-screen keyboard for creating complex sounds.
- Multiple sound engines (virtual analog, wavetable, physical modeling)
- Extensive modulation sources and destinations
- Full MIDI mapping
- 16-step sequencer with pattern editor
- Waveform and dynamic visualizations
- On-screen keyboard
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Meet Qithesizer, a powerful multi-engine hybrid software synthesizer. Designed with wind controller in mind, it combines virtual analog, wavetable, and physical modeling in one. 【Features】 ∙ Multiple sound engines: basic waveforms, hundreds of digital waveforms, multiple physical models ∙ 11 modulation sources, 27 modulation destinations ∙ Full midi mapping ∙ 16-step sequencer with powerful pattern editor, save patterns by preset ∙ Waveform and dynamic visualizations ∙ Full-size, on-screen keyboard Our site: www.robkoo.com Facebook Page: @RobkooMusic Twitter: @Robkoo_Music Feedback: cuimingwei@robkoo.com
Screenshots
Verdict
The clearest difference is rating: TB Flowtones at 4.7 against Qithesizer's 4.1. TB Flowtones also leads on price ($9.99 vs $12.99) and ratings volume (39 vs 11). Qithesizer's advantage is update cadence (fortnightly vs every 3 months). On review sentiment, ads, in-app purchases and monetization model 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
TB Flowtones costs $9.99 and Qithesizer $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.
TB Flowtones holds the better App Store score, 4.7 against 4.1. Both are backed by a comparable volume of ratings — 39 and 11 respectively. Written reviews point the same way: 83% of TB Flowtones's written reviews are positive against 77% of Qithesizer's.
TB Flowtones ships an update every 3 months, Qithesizer fortnightly. Both last shipped on November 3, 2026.
| Parameter | TB Flowtones | Qithesizer |
|---|---|---|
| Price | $9.99 — better | $12.99 |
| Rating | 4.7 (39 ratings) — better | 4.1 (11 ratings) |
| Positive reviews | 82.9% of reviews — better | 76.9% of reviews |
| Number of ratings | 39 — better | 11 |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 17 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | ToneBoosters | Robkoo Information & Technologies Co., Ltd. |
Customer experience
TB Flowtones
Qithesizer
In-app purchases
TB Flowtones
No in-app purchases
Qithesizer
No in-app purchases









