sumFX vs DJCJ Player
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
DJCJ Player
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If you like to have an analog-style pitch control for your music, like the pitch control on a turntable, DJCJ Player is for you. You can set the low and high value of the pitch control slider from -50% to +50%. It allows pitch shift in as little as .01% increments. Pitch and speed increase together just like on an analog turntable. Optimum sound quality is maintained. Free. No Ads. No subscriptions. No in-app purchases. Just a gift from DJCJ to you. This app will only play music that is synced to your device. It does not play music from any subscription streaming service. It does not play DRMed music.
Screenshots
Verdict
The clearest difference is price: DJCJ Player at Free against sumFX's $9.99. DJCJ Player also leads on update cadence (every 3 weeks vs every 6 months). sumFX's advantage is iOS requirement (12.0 vs 26.5). 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
DJCJ Player is free to download; sumFX costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
sumFX ships an update every 6 months, DJCJ Player every 3 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | sumFX | DJCJ Player |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 4.4 (12 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Every 6 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 26.5 |
| Further details — not scored | ||
| Size | 44 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | OSC Audio | CHRISTOPHER ALAN JOHNSON |
In-app purchases
sumFX
No in-app purchases
DJCJ Player
No in-app purchases
