# iFX Rack vs sumFX

The clearest difference is rating: sumFX at 4.4 against iFX Rack's 3.8. sumFX also leads on in-app purchases (none vs 20). iFX Rack's advantage is update cadence (monthly vs every 6 months) and review sentiment (70% vs 55%). On price, ratings volume, ads and device support there is nothing between them.

iFX Rack costs $9.99 and sumFX $9.99 up front. iFX Rack sells 20 one-off in-app purchases. sumFX asks for nothing beyond the download.

sumFX holds the better App Store score, 4.4 against 3.8. Both are backed by a comparable volume of ratings — 10 and 12 respectively. Written reviews complicate that: 70% of iFX Rack's written reviews are positive against 55% of sumFX's, so the app with the better star average is not the one people write more warmly about.

iFX Rack ships an update monthly, sumFX every 6 months. The most recent releases landed on August 30, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | iFX Rack | sumFX |
| --- | --- | --- |
| Price | $9.99 | $9.99 |
| Rating | [3.8 (10 ratings)](https://appshunter.io/ios/app/ifx-rack/id1462580765/reviews) | **[4.4 (12 ratings)](https://appshunter.io/ios/app/sumfx/id6450494474/reviews)** |
| Number of ratings | 10 | **12** |
| Positive reviews | **69.6% of reviews** | 54.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 279 MB | 44 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MIDIculous LLC](https://appshunter.io/developer/579058990) | [OSC Audio](https://appshunter.io/developer/1693533681) |

## What reviewers say

### iFX Rack

[App page](https://appshunter.io/ios/app/ifx-rack/id1462580765)

This app offers a virtual analog effects rack for iOS devices, featuring meticulously modeled vintage analog processors. It includes a suite of classic effects and allows for flexible FX chain assignment and MIDI automation.

**Highlights:** Analog modeled virtual effects rack, Vintage analog circuit modeling, AUv3 support, MIDI learnable automation, Dynamically drag-able FX chain, Includes VKFX effects suite

**Features:** Family Sharing, Vision Pro support

**In-app purchases (20)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Distortit | $0.99 | one-time |
| Spring Reverb | $0.99 | one-time |
| Flanger | $0.99 | one-time |
| Amp Combo | $1.99 | one-time |
| SUB Harm | $1.99 | one-time |
| Amp Sim | $2.99 | one-time |
| DimenD Chorus | $2.99 | one-time |
| Detune | $2.99 | one-time |
| FantasyVerb | $3.99 | one-time |
| 11 Band EQ | $3.99 | one-time |
| ST Widener Enhancer | $3.99 | one-time |
| iFX Amp | $3.99 | one-time |
| PhatFilt | $3.99 | one-time |
| Talkbox® Effect | $3.99 | one-time |
| Rotar | $4.99 | one-time |
| Master Limiter | $4.99 | one-time |
| IMPULSation for iFX Rack | $6.99 | one-time |
| Phick Analog Thickener | $6.99 | one-time |
| Additional Effects Bundle | $7.99 | one-time |
| CloudVerb | $9.99 | one-time |


### sumFX

[App page](https://appshunter.io/ios/app/sumfx/id6450494474)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is iFX Rack free?

iFX Rack costs $9.99, and also offers in-app purchases.

### Is sumFX free?

sumFX costs $9.99, with no in-app purchases.

### Which has better reviews, iFX Rack or sumFX?

sumFX is rated higher. iFX Rack averages 3.8 out of 5 from 10 ratings, while sumFX averages 4.4 from 12 ratings.

### Do iFX Rack or sumFX have ads?

Neither iFX Rack nor sumFX shows ads.

### Which is updated more often, iFX Rack or sumFX?

iFX Rack ships an update monthly, and sumFX every 6 months. Most recently, iFX Rack was updated on August 30, 2026 and sumFX on September 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*