Comparison

sumFX vs Guitar FX Powerage

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

Head to head
About

sumFX

This app is a versatile audio effects processor for musicians. It offers a modular design with multiple high-quality FX modules and customizable slots, allowing for quick creation of unique sounds. Focus on your music with intuitive controls and visual feedback.

Highlights
  • Modular multi-FX processor
  • 8 high-quality FX modules
  • 8 FX slots with Wet/Dry control
  • 2 LFOs per slot
  • 50+ cross-platform presets
  • Pre/post waveform view
Features
Read full description

sumFX is a modular multi-FX processor for Mac/PC and iOS. Designed with simplicity in mind, to help keep you focused on the music and the sum of your efforts. Packed with 8 high quality FX modules and an available 8 slots, each loaded with Wet/Dry control, Global Wet/Dry, and 2 LFOs per slot, creating new unique sounds is quick and easy. 50+ cross-platform slot & chain presets are included to get you to any sound you need quickly and we’ve packed in an easy to use pre/post waveform view to help keep you focused on the result of your FX. Modules: -syncDynamics - Multimode dynamic FX with BPM sync attack/release (Noise Gate, Expander, Compressor, Limiter) -stereoFilter - Stereo filter with link or individual channel controls (LPF12, HPF12, BPF12, LPF24, HPF24, BPF24, Notch, & Formant options). -variMod - Multimode modulation FX with stereo offset (Chorus, Flanger,  Vibrato, Phaser, Tremolo,  & Auto Pan) -EQuator - Full high quality EQ module (3 Parametric Bands, High/Low Shelf, & HPF/LPF). -frostReverb - Multi-Mode (Original, Plate, Spring, Room) Stereo Reverb.  -bucketDelay - Stereo Analog Style Delay with individual channel control. -variPitch - Stereo Pitch Shifter with 3X Modes (Doubler, Harmonizer, & Full Control) -powerPhase - Multimode Saturation, Utility Gain In/Out, Mono Maker, Channel msDelay, & Phase inverter.

About

Guitar FX Powerage

Features
Read full description

Unleash the true power of Guitar FX Processor. Whether you’re a seasoned musician or just starting out, Guitar FX elevates your music to new heights. With an array of customizable effects, from Reverb and Delay to Overdrive and Modulation, this effects processor is designed to inspire and empower your creativity. Features: * Seamless Integration: Effortlessly connects with your iPad, Audio Interfaces, Guitar and Amps setups. * User-Friendly interface: Intuitive controls and a bright display make it easy to dial in your perfect Classic tones. * Basic Effects: Most used effects to deliver pristine studio-grade tone quality for every performance. Perfect for live gigs, studio recording or practice sessions, the Guitar FX processor is your ultimate companion on your music journey. it support any Audio Interface with Lightning or USB-C connection (Like I-Rig all models and others) Download now and transform your Guitar Playing experience!

Screenshots

sumFX3 screens
Guitar FX Powerage2 screens

Verdict

The call

The clearest difference is price: Guitar FX Powerage at $7.99 against sumFX's $9.99. sumFX's advantage is iOS requirement (12.0 vs 17.0). On update cadence, 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

sumFX costs $9.99 and Guitar FX Powerage $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

sumFX ships an update every 6 months, Guitar FX Powerage every 8 months. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
sumFX versus Guitar FX Powerage: the parameters behind the verdict, then further details
ParametersumFXGuitar FX Powerage
Price$9.99$7.99 — better
Rating4.4 (12 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings12 — better—
Update frequencyEvery 6 months — betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.0
Further details — not scored
Size44 MB3 MB
Age rating4+4+
DeveloperOSC AudioLuis Alberto Ruiz

In-app purchases

None

sumFX

No in-app purchases

None

Guitar FX Powerage

No in-app purchases

Questions

Is sumFX free?
sumFX costs $9.99, with no in-app purchases.
Is Guitar FX Powerage free?
Guitar FX Powerage costs $7.99, with no in-app purchases.
Do sumFX or Guitar FX Powerage have ads?
Neither sumFX nor Guitar FX Powerage shows ads.
Which is updated more often, sumFX or Guitar FX Powerage?
sumFX ships an update every 6 months, and Guitar FX Powerage every 8 months. Most recently, sumFX was updated on November 7, 2026 and Guitar FX Powerage on October 30, 2026.

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