Audiofusion Performer vs Sunday Keys
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- 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
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 23, 2026 and October 9, 2026 respectively.
| Parameter | Audiofusion Performer | Sunday Keys |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (36 ratings) | 4.6 (115 ratings) — better |
| Positive reviews | 38.5% of reviews | 70.9% of reviews — better |
| Number of ratings | 36 | 115 — better |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPad, Mac |
| Requires iOS | 10.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 32 MB | 201 MB |
| Age rating | 4+ | 4+ |
| Developer | Audio Fusion Systems, LLC | Loop Community |
Customer experience
Audiofusion Performer
Sunday Keys
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 moreShow fewer
- 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
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- 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
Audiofusion Performer
No in-app purchases
Sunday Keys
No in-app purchases
Questions
Is Audiofusion Performer free?
Is Sunday Keys free?
Which has better reviews, Audiofusion Performer or Sunday Keys?
Do Audiofusion Performer or Sunday Keys have ads?
Which is updated more often, Audiofusion Performer or Sunday Keys?
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