Comparison

Stereo Modulator vs Hexa FM

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

Head to head
About

Stereo Modulator

This audio effect plugin transforms mono sound into stereo, adding width and depth. It uses micro-delays to create a natural sense of space, with optional LFO modulation for a Leslie speaker-like effect without pitch shifting. Ideal for creating separation in mixes, especially for guitars and vocals.

Highlights
  • Mono to stereo conversion
  • Adjustable stereo width
  • Optional LFO modulation
  • Micro-delay de-correlators
  • Creates natural spatial depth
  • No pitch shifting or echo
Features
Read full description

Stereo Modulator is an AU3 effect that converts mono sound into stereo, with an adjustable width and optional LFO modulation. It works by using a bank of randomized stereo de-correlators that apply micro-delays to introduce random differences between the spectrums of the left and right audio channels. In its output we hear a natural sense of space that is not present in mono recordings. It's similar to the sound space one gets from using a stereo reverb plugin except that it is tight and clear, without echo. It can operate either as a static effect or it can be gently modulated by a low-frequency oscillator. The modulation is akin to the sound of a Leslie speaker, except that it doesn't do any pitch shifting, so the output remains focused and tuning is not compromised. This effect is especially useful for mixing overdriven electric guitar sounds together with vocals. Using Stereo Modulator on the guitars, we can push them out to the sides, creating a space in the centre for the vocal to cut through, without needing to reduce the volume of the guitars. NOTE: Stereo Modulator is an AU3 plugin only, not a standalone app. To use it, you will need an audio unit host app such as Garageband or Audiobus.

About

Hexa FM

Features
Read full description

HEXA FM é um sintetizador FM de 6 operadores para iPhone e iPad, desenvolvido para músicos e produtores que procuram a sonoridade clássica da síntese digital. Use o app de forma independente com seu teclado virtual multitouch sensível à velocity ou carregue-o como instrumento Audio Unit v3 — AUv3 — dentro de hosts compatíveis. O app inclui 128 timbres de fábrica, entre pianos elétricos, órgãos, baixos, leads, pads, metais e sons percussivos. Também permite importar bancos .syx compatíveis com o formato DX7, selecionar presets e organizar seus bancos importados. Possui até 32 vozes de polifonia, modos Poly e Mono, volume, reverb, chorus estéreo e suporte MIDI para velocity, pitch bend, modulation wheel, sustain, aftertouch Sua interface moderna adapta-se ao tamanho da tela do iPhone, iPad e à janela do host AUv3, oferecendo acesso rápido aos bancos, timbres e controles essenciais

Screenshots

Stereo Modulator3 screens
Hexa FM2 screens

Verdict

The call

The clearest difference is update cadence: Hexa FM at every 2 weeks against Stereo Modulator's every 3 months. Stereo Modulator's advantage is price ($2.99 vs $5.99) and iOS requirement (10.0 vs 15.0). On ads, in-app purchases and device support 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

Stereo Modulator costs $2.99 and Hexa FM $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Stereo Modulator ships an update every 3 months, Hexa FM every 2 weeks. Both last shipped on October 24, 2026.

Scorecard3 real differences · 7 level
Stereo Modulator versus Hexa FM: the parameters behind the verdict, then further details
ParameterStereo ModulatorHexa FM
Price$2.99 — better$5.99
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better15.0
Further details — not scored
Size2 MB3 MB
Age rating4+4+
DeveloperBlue Mangoo Consulting Company Limitedisael lopes guimaraes

In-app purchases

None

Stereo Modulator

No in-app purchases

None

Hexa FM

No in-app purchases

Questions

Is Stereo Modulator free?
Stereo Modulator costs $2.99, with no in-app purchases.
Is Hexa FM free?
Hexa FM costs $5.99, with no in-app purchases.
Do Stereo Modulator or Hexa FM have ads?
Neither Stereo Modulator nor Hexa FM shows ads.
Which is updated more often, Stereo Modulator or Hexa FM?
Stereo Modulator ships an update every 3 months, and Hexa FM every 2 weeks. Most recently, Stereo Modulator was updated on October 24, 2026 and Hexa FM on October 24, 2026.

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