Comparison

JAX Convolutor PRO (AU) vs sumFX

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

Head to head
About

JAX Convolutor PRO (AU)

This app uses complex signal processing to create realistic reverberation effects by analyzing real-world environments. It allows users to apply these effects to audio material, making it sound as if it were played in a specific location. Advanced adjustments can refine the results for professional audio production.

Highlights
  • Realistic reverberation effects
  • Impulse response analysis
  • Audio material manipulation
  • FFT algorithm processing
  • Customizable adjustments
Features
Read full description

Remarks: This is an Audio Unit, but you have to open the distribution app ones at least to install the included IR file library. Convolution is a highly complex signal processing approach, that needs some certain computation power. The recorded impulse response of a real world environment is used to render a reverberation effect onto any audio material, so that it sounds like the source was played in that original room or at that location. Some further adjustments and manipulations can be applied to refine these results. Now this all may sound somewhat naive at first listen but the entire calculation is extremely complex math, so that the very first processors and computers were able to perform this in realtime rather around the end of the last millennium. Basically, the impulse responses and the audio stream are completely analyzed with FFT algorithms and then the entire analysis data will be cross-modulated into the realtime audio stream by performing a repeated highly performance intensive re-synthesis and accumulation processing for each analysis block of the impulse response. Therefore it is a crucial performance factor that you use JAX Convolutor with larger processing buffer sizes (1024) samples. Shorter buffers may raise the CPU hit exorbitantly for several reasons. The manual is embedded into the main app.

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.

Screenshots

JAX Convolutor PRO (AU)4 screens
sumFX3 screens

Verdict

The call

JAX Convolutor PRO (AU) and sumFX both sit at 4.6 stars, but that hides the real split: 100% of JAX Convolutor PRO (AU)'s written reviews are positive against 50% of sumFX's. sumFX's advantage is update cadence (every 6 months vs every 25 months). On price, rating, ratings volume and ads 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

JAX Convolutor PRO (AU) costs $9.99 and sumFX $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

JAX Convolutor PRO (AU) holds the better App Store score, 4.6 against 4.4. Both are backed by a comparable volume of ratings — 5 and 12 respectively. Written reviews point the same way: 100% of JAX Convolutor PRO (AU)'s written reviews are positive against 50% of sumFX's.

UpkeepUpdate frequency

JAX Convolutor PRO (AU) ships an update every 25 months, sumFX every 6 months. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

Scorecard2 real differences · 8 level
JAX Convolutor PRO (AU) versus sumFX: the parameters behind the verdict, then further details
ParameterJAX Convolutor PRO (AU)sumFX
Price$9.99$9.99
Rating4.6 (5 ratings) — better4.4 (12 ratings)
Positive reviews100.0% of reviews — better50.0% of reviews
Number of ratings512 — better
Update frequencyEvery 25 monthsEvery 6 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size139 MB44 MB
Age rating4+4+
DeveloperJens GuellOSC Audio

Customer experience

JAX Convolutor PRO (AU)

All ratings5 ratings
Positive80.0%
Neutral20.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

sumFX

All ratings12 ratings
Positive83.3%
Neutral8.3%
Negative8.3%
Written reviews12 reviews
Positive50.0%
Neutral16.7%
Negative33.3%

In-app purchases

None

JAX Convolutor PRO (AU)

No in-app purchases

None

sumFX

No in-app purchases

Questions

Is JAX Convolutor PRO (AU) free?
JAX Convolutor PRO (AU) costs $9.99, with no in-app purchases.
Is sumFX free?
sumFX costs $9.99, with no in-app purchases.
Which has better reviews, JAX Convolutor PRO (AU) or sumFX?
JAX Convolutor PRO (AU) is rated higher. JAX Convolutor PRO (AU) averages 4.6 out of 5 from 5 ratings, while sumFX averages 4.4 from 12 ratings.
Do JAX Convolutor PRO (AU) or sumFX have ads?
Neither JAX Convolutor PRO (AU) nor sumFX shows ads.
Which is updated more often, JAX Convolutor PRO (AU) or sumFX?
JAX Convolutor PRO (AU) ships an update every 25 months, and sumFX every 6 months. Most recently, JAX Convolutor PRO (AU) was updated on November 3, 2026 and sumFX on November 7, 2026.

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