Comparison

Audiofusion Performer vs Sunday Keys

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

Head to head
About

Audiofusion Performer

Transform your iPhone into a wireless in-ear monitoring system by receiving real-time audio over Wi-Fi. This app offers complete control over your personal sound mix, allowing adjustments to volume, panning, and labeling of audio inputs. It works in conjunction with companion software for broadcasting and managing mixes.

Highlights
  • Wireless in-ear monitoring
  • Real-time audio reception via Wi-Fi
  • Personalized monitor mix control
  • Volume, panning, and labeling adjustments
  • Works with companion SoundCaster app
  • Compatible with Audiofusion Director for iPad
Read full description

By receiving real-time audio over Wi-Fi and playing it through your ear phones, Audiofusion Performer turns your iPhone into a wireless in-ear monitoring system. Plus, Performer is a complete monitor mixer, giving you complete control over the sound in your ears. Adjust the volume, panning and labeling of each audio input to create your personalized mix. Performer receives its audio from our Audiofusion SoundCaster app, which runs on MacBook. SoundCaster connects to your digital audio source and broadcasts it in real-time over Wi-Fi to each connected Performer. Performer will only receive audio from Audio Fusion's SoundCaster software. Performer and SoundCaster work in conjunction with a third app for iPad called Audiofusion Director. It can be used by the sound technician or monitor engineer to hear the mix each musician has on their Performer. Director gives you simultaneous control over each musician's mix to help with troubleshooting and fine-tuning. With it, you can also edit the instrument labels and remotely control the audio settings on SoundCaster.

About

Sunday Keys

This app provides a comprehensive worship keyboard rig for iPad, allowing users to access and organize their sounds, patches, and setlists. It supports AUv3 instrument plugins and offers powerful audio and MIDI effects for live performance and service preparation.

Highlights
  • AUv3 instrument plugin hosting
  • Organized sound, patch, and setlist library
  • Touch-optimized interface
  • Powerful audio and MIDI effects
  • Tonic Pad Player for ambient pads
  • MIDI hardware and Bluetooth support
Read full description

The Sunday Keys App is the best way to access your favorite resources from SundaySounds.com using just your iPad and now supports hosting your favorite AUv3 instrument plugins! Login to your existing SundaySounds.com account to access your available content and enjoy an optimized Sunday Keys experience, designed for churches, built for iPad. *****You'll need an existing SundaySounds.com account to use the Sunday Keys App. If you don't have any purchased resources you can still login with an existing Sunday Sounds account and try out the App in demo mode. Additional SundaySounds.com content will be made available over time within the Sunday Keys App. Sunday Keys features powerful workflows for fast preparation of your worship services and reliable live performance with on the fly flexibility and control. Featuring an interface designed for touch, quickly browse the ready to play Patches or create exactly what you need by easily layering Sounds together across the keyboard. The App is designed specifically for the needs of worship teams, so it's easy to stay organized. Easily browse your favorite Sounds, Patches, and Setlists from the User Library with full support for custom folders and built-in search tools. Setlist Sharing makes it easy to send a Setlist to a friend or member of your worship team with just a tap. Sunday Keys will deliver reliable performance and incredible results for your worship team, allowing you to take your live worship keys rig to the next level, all from your iPad. Based on your content from SundaySounds.com choose from a growing library of individual Sounds and ready to play Patches with more content to be added regularly.* Browse a wide selection of incredible Sounds including grand, upright, and felt pianos, warm and evolving pads, strings, synth leads, bass, and more. You can now also host your favorite AUv3 instrument plugins inside Sunday Keys, making this App the ultimate host for your favorite plugins! Sunday Keys features a full suite of audio effects including stereo Delay, lush Reverb, Chorus, Tremolo, Rotor, Overdrive, and more plus powerful midi effects including an Arpeggiator, Easy Chord, and a full midi Sequencer, all available for both the internal Sound Library and applying to AUv3 instruments as you'd like. Use the Tonic Pad Player to glue together your band and cover any transition with gorgeous background ambient pads. You have full control over the drone's sound, crossfade time, and tone so you'll always fill just the right amount of space. Use the Tonic Pad on the fly or easily program seamless changes per Patch as you move through your Setlist. Connect any class-compliant Midi hardware and an audio interface to the App and enjoy tactile control via full Midi Learn functionality. Bluetooth and Network Midi are also fully supported! Detailed information on Midi and Audio connections can be found here: https://support.sundaysounds.com/hc/en-us/articles/5874902996247 Download Sunday Keys to get started with an all new way to play worship keys. *Content will be added to the Sunday Keys App as it is available. The core Sunday Keys Sound Library will be prioritized as additional Sounds and Patches are added. Once the full library is available the Sunday Keys Sound Library will receive monthly updates according to the terms of our license agreement available at SundaySounds.com

Screenshots

Audiofusion Performer3 screens

Verdict

The call

The clearest difference is review sentiment: Sunday Keys at 71% against Audiofusion Performer's 38%. Sunday Keys also leads on rating (4.6 vs 4.2) and ratings volume (115 vs 36). Audiofusion Performer's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (10.0 vs 15.0). On price, update cadence, ads and in-app purchases 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Sunday Keys holds the better App Store score, 4.6 against 4.2. Both are backed by a comparable volume of ratings — 36 and 115 respectively. Written reviews point the same way: 38% of Audiofusion Performer's written reviews are positive against 71% of Sunday Keys's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 23, 2026 and October 9, 2026 respectively.

Scorecard5 real differences · 5 level
Audiofusion Performer versus Sunday Keys: the parameters behind the verdict, then further details
ParameterAudiofusion PerformerSunday Keys
PriceFreeFree
Rating4.2 (36 ratings)4.6 (115 ratings) — better
Positive reviews38.5% of reviews70.9% of reviews — better
Number of ratings36115 — better
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPad, Mac
Requires iOS10.0 — better15.0
Further details — not scored
Size32 MB201 MB
Age rating4+4+
DeveloperAudio Fusion Systems, LLCLoop Community

Customer experience

Audiofusion Performer

All ratings36 ratings
Positive77.8%
Neutral5.6%
Negative16.7%
Written reviews13 reviews
Positive38.5%
Neutral15.4%
Negative46.2%

Sunday Keys

All ratings115 ratings
Positive87.0%
Neutral5.2%
Negative7.8%
Written reviews55 reviews
Positive70.9%
Neutral9.1%
Negative20.0%

Bugs and requests

Audiofusion Performer

Not enough reviews yet to summarise bugs or requests.

Sunday Keys

Reported bugs

8 issues
  • App crashing on iPad
  • Drone not working reliably
  • Core audio error on iPad
  • Sound library installation issues
  • App not running on older macOS versions
Show 3 more
  • UVI plugins sometimes fail to load
  • App glitching and closing mid-service
  • App reappearing after deletion

Requested features

10 requests
  • AUv3 plugin support for Logic Pro and GarageBand iOS
  • Sampler/looper functionality
  • Loop player
  • MIDI monitor on main screen displaying chords
  • Ability to use third-party plugins
Show 5 more
  • HD Pianos sound library
  • Graphical EQ
  • Pitch bend wheel/lever
  • Song-specific patches with more editing flexibility
  • Assign controllers to more parameters (tremolo speed, envelope attack, etc.)

In-app purchases

None

Audiofusion Performer

No in-app purchases

None

Sunday Keys

No in-app purchases

Questions

Is Audiofusion Performer free?
Audiofusion Performer is free to download, with no in-app purchases.
Is Sunday Keys free?
Sunday Keys is free to download, with no in-app purchases.
Which has better reviews, Audiofusion Performer or Sunday Keys?
Sunday Keys is rated higher. Audiofusion Performer averages 4.2 out of 5 from 36 ratings, while Sunday Keys averages 4.6 from 115 ratings.
Do Audiofusion Performer or Sunday Keys have ads?
Neither Audiofusion Performer nor Sunday Keys shows ads.
Which is updated more often, Audiofusion Performer or Sunday Keys?
Audiofusion Performer ships an update every 3 weeks, and Sunday Keys every 3 weeks. Most recently, Audiofusion Performer was updated on September 23, 2026 and Sunday Keys on October 9, 2026.

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