Comparison

TB Lowtone vs VAPoly16

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

TB Lowtone

This app is an innovative bass synthesizer and AUv3 plugin that uses loudness-domain harmonic synthesis for deeper, more consistent bass sounds. It features multiple oscillators, modulation options, and built-in effects, plus an AI randomizer for creating new patches.

Highlights
  • Loudness-domain harmonic synthesis
  • 3 analog-simulated oscillators
  • Voltage-controlled noise synthesizer
  • AI randomizer for patch generation
  • Extended LFOs and ADSR envelope
  • Pro quality effects (reverb, chorus, delay)
  • AUv3 plugin support
Read full description

TB Lowtone is an innovative bass synthesizer app and AUv3 plug-in featuring three analog-simulated, voltage-controlled oscillators with a large variety of waveform algorithms, continuous pulse-width modulation (PWM), Frequency Modulation (FM) and oscillator hard sync, complemented by a voltage-controlled noise synthesizer, parameter modulation a re-designed non-linear voltage controlled filter. TB Lowtone is the world's first bass synthesizer featuring loudness-domain harmonic synthesis, creating deeper, more consistent and production-ready bass sounds compared to conventional synthesizers operating in the (linear) amplitude domain. TB Lowtone also features an AI randomizer that generates new patches with a single click, and which learns from the patches you have already created to generate new, personalized patches! Loudness-domain synthesis Loudness perception of tones and harmonics is known to be highly non-linear and intricately frequency and level dependent. Equal loudness contours, or Fletcher-Munson curves demonstrate this drastic effect for sine tones, which is especially relevant for low frequencies. The loudness of a synthesizer bass note, and all its individual harmonics, will therefore depend strongly on what note you play on your synth's keyboard. To overcome the resulting inconsistencies in loudness and timbre, TB Lowtone features innovative, loudness-domain synthesis algorithms that adjust each harmonic individually to compensate for loudness deviations across frequency. Modulation and FX TB Lowtone provides two extended low-frequency oscillators (X-LFOs) featuring a wide range of waveforms. The LFOs can be beat and key synced, with a configurable onset delay and a specific number of cycles to run. In addition, a conventional ADSR envelope with configurable onset delay is provided. To top if all off, a gate editor designed to quickly put together modern production modulation patterns is available as well to modulate a range of VCO, VCN and VCF parameters. Reverb, chorus, and delay effects and a high-quality peak limiter are provided to produce production-ready sounds. Features: - 3 VCOs plus a VCN featuring a wide range of waveform algorithms - All VCOs support hard sync, pulse-width modulation (PWM) and frequency modulation (FM) - Lots of filter types for spectral shaping - 2 LFOs, one extra envelope and a gate editor for parameter modulation - Pro quality effects (reverb, chorus, delay, peak limiter) - Unique loudness domain synthesis algorithms - A smart randomiser that learns from your patches - AUv3 with resizable UI and dozens of color themes to choose from - Preset management including import and export options - Undo, redo, A/B switching 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.

About

VAPoly16

This app is a virtual analog polyphonic synthesizer for iOS and Mac. It offers 16 voices, a sequencer, and various audio effects. It can be used as a standalone application or as an AudioUnit Extension.

Highlights
  • 16 voice virtual analog synthesizer
  • Bitimbral sound design
  • Sequencer with piano roll and automation
  • Multiple audio effects (delay, reverb, chorus, etc.)
  • Standalone and AUv3 extension support
  • Ableton Link and MIDI connectivity
  • Audio file export
Features
Read full description

VAPoly16 is a virtual analog bitimbral polyphonic synthesizer for iPhone, iPad and Mac. It features 16 voice synthesizer, effects, sequencer and audio visualization tools. It operates as a stand alone or as an AudioUnit Extension (AUv3). Stand Alone supports Ableton Link, MIDI and audio file export. The synthesizer consists of two 8 voice synthesizer, which features two oscillators, two ADSR envelopes, resonant high pass and low pass filter and an amplifier per voice. The oscillators features continuously variable wave shape and wide variety of modulation. The filters are modeled on the Sallen-Key filter circuit for classic analog sound. The Effects include delay, chorus, flanger, reverb, eq and compressor. The sequencer features piano roll and automation editor to program 16 bar pattern per clip. Project files can be saved in iCloud Drive, so that the project can be accessed from iPhone, iPad or Mac. Main Features Virtual analog 16 voice bitimbral polyphonic synthesizer Sequencer 16 bar patterns per clip. Total 16 clips. Parameter automation. Audio Export Linear PCM format (AIFF, WAV and CAF) and compressed format (AAC) Support Audio Unit Extension (AUv3) Works on iPhone, iPad and Mac. Support iCloud Drive. Support Ableton Link, Bluetooth MIDI, MIDI In / Out. System Requirements For iOS Devices, A10 Fusion or above is recommended. AudioUnit Extension (AUv3) requires host application which support AudioUnit Extension. AudioUnit Extension is supported by Apple Logic and Apple Garage Band on iOS and macOS. For any other DAW, it depends on the application and some of them don’t support AudioUnit Extension.

Screenshots

TB Lowtone2 screens
VAPoly164 screens

Verdict

The call

The clearest difference is rating: VAPoly16 at 5.0 against TB Lowtone's 4.4. VAPoly16 also leads on review sentiment (100% vs 85%). TB Lowtone's advantage is price ($9.99 vs $14.99) and iOS requirement (13.0 vs 16.4). On ratings volume, update cadence, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

TB Lowtone costs $9.99 and VAPoly16 $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

VAPoly16 holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 14 and 13 respectively. Written reviews point the same way: 85% of TB Lowtone's written reviews are positive against 100% of VAPoly16's.

UpkeepUpdate frequency

TB Lowtone ships an update every 3 months, VAPoly16 every 2 months. The most recent releases landed on September 9, 2026 and September 20, 2026 respectively.

Scorecard4 real differences · 6 level
TB Lowtone versus VAPoly16: the parameters behind the verdict, then further details
ParameterTB LowtoneVAPoly16
Price$9.99 — better$14.99
Rating4.4 (14 ratings)5.0 (13 ratings) — better
Positive reviews84.6% of reviews100.0% of reviews — better
Number of ratings14 — better13
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS13.0 — better16.4
Further details — not scored
Size13 MB20 MB
Age rating4+4+
DeveloperToneBoostersRyo Togawa

Customer experience

TB Lowtone

All ratings14 ratings
Positive85.7%
Neutral7.1%
Negative7.1%
Written reviews13 reviews
Positive84.6%
Neutral15.4%
Negative0.0%

VAPoly16

All ratings13 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

TB Lowtone

No in-app purchases

None

VAPoly16

No in-app purchases

Questions

Is TB Lowtone free?
TB Lowtone costs $9.99, with no in-app purchases.
Is VAPoly16 free?
VAPoly16 costs $14.99, with no in-app purchases.
Which has better reviews, TB Lowtone or VAPoly16?
VAPoly16 is rated higher. TB Lowtone averages 4.4 out of 5 from 14 ratings, while VAPoly16 averages 5.0 from 13 ratings.
Do TB Lowtone or VAPoly16 have ads?
Neither TB Lowtone nor VAPoly16 shows ads.
Which is updated more often, TB Lowtone or VAPoly16?
TB Lowtone ships an update every 3 months, and VAPoly16 every 2 months. Most recently, TB Lowtone was updated on September 9, 2026 and VAPoly16 on September 20, 2026.

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