Comparison

MultiTracks.com ChartBuilder 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

MultiTracks.com ChartBuilder

Customize song charts with adjustable keys, capo settings, and chord displays. Add annotations, create setlists, and sync with audio playback for seamless practice and performance. Access a vast library of charts with a subscription.

Highlights
  • Endless chart customization
  • Adjustable key, capo, and chord display
  • In-app annotations and highlighting
  • Setlist creation and collaboration
  • Sync with audio playback
  • Multiple chart type options
Features
Currently charting
Read full description

ChartBuilder® allows you to endlessly customize each chart to meet your needs. Change the Key, Capo, Chord Display, & Layout with filters. Write, type, & highlight in any song section on your charts with Annotations. Easily save & recall them at any time. Lead with confidence. ChartBuilder® Features: • Access to every chart in our catalog with an active ChartBuilder Content Subscription • Teams with RehearsalMix can listen to the original song with a specific instrument turned up or down! • Create & Collaborate on setlists with your team in Playback, ChartBuilder and on our Website. • Charts available in all 12 keys • ChartBuilder and RehearsalMix Sync: Your chart auto-scrolls as RehearsalMix audio plays • Loop individual song sections in the RehearsalMix • Chart Type options (Chords & Lyrics, Lyrics, or Song Map) • Chord Display options (Chords, Numbers, Numerals, or Do-Re-Mi) • Change song section style (Condensed or Full) • Annotations • Optional Song Map that matches the original recording and MultiTrack • Optional MD Notes • Browse songs by Title, Album, Genre, Theme, or Top Songs • Bluetooth Control (Compatible with AirTurn, Coda Music, Donner, and other external keyboard devices) • View user-generated Cloud Charts Solo Practice Bundle (5.99 per Month): • Free 30-day trial (Subscription renews at end of 30-day​ trial) • Payment will be charged to iTunes Account at confirmation of purchase. • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period • The account will be charged for renewal within 24-hours prior to the end of the current period for $5.99 • Subscriptions may be managed by the user and auto-renewal maybe be turned off by going to the users' Account Settings after purchased • Any unused portion of a free trial period will be forfeited when the user purchases a subscription where applicable Terms of Use (https://www.multitracks.com/terms/) ChartBuilder Team Content (12.99 per Month): • Free 30-day trial (Subscription renews at end of 30-day​ trial) • Payment will be charged to iTunes Account at confirmation of purchase. • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period • The account will be charged for renewal within 24-hours prior to the end of the current period for $12.99 • Subscriptions may be managed by the user and auto-renewal maybe be turned off by going to the users' Account Settings after purchased • Any unused portion of a free trial period will be forfeited when the user purchases a subscription where applicable • Terms of Use (https://www.multitracks.com/terms/) ChartBuilder App (1.99 per Month) • Free 30-day trial (Subscription renews at end of 30-day trial) • Payment will be charged to iTunes Account at confirmation of purchase. • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period • The account will be charged for renewal within 24-hours prior to the end of the current period for $1.99 • Subscriptions may be managed by the user and auto-renewal maybe be turned off by going to the users' Account Settings after purchased • Any unused portion of a free trial period will be forfeited when the user purchases a subscription where applicable • Terms of Use (https://www.multitracks.com/terms/) Price may vary by location. Subscriptions will be charged to your credit card through your iTunes account. Your subscription will automatically renew unless canceled at least 24 hours before the end of the current period. You will not be able to cancel the subscription once activated. Any unused portion of a free trial will be forfeited if you upgrade from a free subscription to a paid version. Manage your subscriptions in Account Settings after purchase. For more details on our Privacy Policy and Terms of Use please visit: http://www.multitracks.com/privacy/ and http://www.multitracks.com/terms/

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

MultiTracks.com ChartBuilder4 screens

Verdict

The call

The clearest difference is in-app purchases: Sunday Keys at none against MultiTracks.com ChartBuilder's 4. Sunday Keys also leads on review sentiment (71% vs 63%). MultiTracks.com ChartBuilder's advantage is ratings volume (6K vs 114) and rating (4.8 vs 4.6). On price, update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. MultiTracks.com ChartBuilder sells 4 in-app purchases, starting at $2.99 per month. Sunday Keys asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

MultiTracks.com ChartBuilder holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: MultiTracks.com ChartBuilder has 6K ratings behind it against 114, so its average is the more settled of the two. Written reviews complicate that: 63% of MultiTracks.com ChartBuilder's written reviews are positive against 71% of Sunday Keys's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

MultiTracks.com ChartBuilder ships an update monthly, Sunday Keys every 3 weeks. The most recent releases landed on September 25, 2026 and September 18, 2026 respectively.

Scorecard6 real differences · 5 level
MultiTracks.com ChartBuilder versus Sunday Keys: the parameters behind the verdict, then further details
ParameterMultiTracks.com ChartBuilderSunday Keys
PriceFreeFree
Rating4.8 (6K ratings) — better4.6 (114 ratings)
Positive reviews62.8% of reviews70.9% of reviews — better
Number of ratings6K — better114
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree with in-app purchases — better
Best chart rank#144 — better—
DevicesiPhone, iPad, iPod — betteriPad, Mac
Requires iOS15.415.0 — better
Further details — not scored
Size283 MB201 MB
Age rating4+4+
DeveloperMultiTracks.comLoop Community

Customer experience

MultiTracks.com ChartBuilder

All ratings6,021 ratings
Positive95.2%
Neutral2.0%
Negative2.8%
Written reviews269 reviews
Positive62.8%
Neutral10.4%
Negative26.8%

Sunday Keys

All ratings114 ratings
Positive87.7%
Neutral5.3%
Negative7.0%
Written reviews55 reviews
Positive70.9%
Neutral9.1%
Negative20.0%

User reviews

MultiTracks.com ChartBuilder

From 6K App Store ratings

What we love

  • 🚀 Great resource for worship teams
  • 👍 Helpful for practice and live performances
  • 🔒 Protects intellectual property
  • 🔧 Customizable chord charts and setlists
  • 🎨 Clean and intuitive user interface

Room to improve

  • 🐛 Buggy and unstable at times
  • 🔑 Subscription issues and login problems
  • 🔇 Audio playback and syncing issues
  • 🚫 Lacks some basic features like annotation
  • 💰 Expensive for the issues experienced

Sunday Keys

From 114 App Store ratings

What we love

  • ✨ High-quality sounds
  • 👍 User-friendly interface
  • 💡 Innovative AI patch builder
  • 🤝 Helpful customer support
  • 🚀 Seamless transitions

Room to improve

  • 💸 High price point
  • ⏳ Annual license renewal
  • 🤔 Complex registration process
  • 🚫 Limited editing of song patches
  • ⚠️ Inconsistent drone functionality

Bugs and requests

MultiTracks.com ChartBuilder

Reported bugs

5 issues
  • Crashes and freezes on launch
  • Inconsistent key changes and song resets
  • Sync issues between devices and the web portal
  • Screenshots triggering account disabling warnings
  • Inability to use app while locked or in background

Requested features

5 requests
  • Ability to customize arrangements and parts
  • Improved offline functionality
  • More control over click track and vocal cues
  • Better integration with other apps and devices
  • Increased font size and accessibility options

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

4 purchases

MultiTracks.com ChartBuilder

Subscriptions4
  • ChartBuilder App$2.991 Month
  • Solo Practice Bundle$6.991 Month
  • Content Subscription$14.991 Month
Show 1 more
  • Chart Pro$21.491 Month
None

Sunday Keys

No in-app purchases

Questions

Is MultiTracks.com ChartBuilder free?
MultiTracks.com ChartBuilder is free to download, with in-app purchases available.
Is Sunday Keys free?
Sunday Keys is free to download, with no in-app purchases.
Which has better reviews, MultiTracks.com ChartBuilder or Sunday Keys?
MultiTracks.com ChartBuilder is rated higher. MultiTracks.com ChartBuilder averages 4.8 out of 5 from 6K ratings, while Sunday Keys averages 4.6 from 114 ratings.
Do MultiTracks.com ChartBuilder or Sunday Keys have ads?
Neither MultiTracks.com ChartBuilder nor Sunday Keys shows ads.
Which is updated more often, MultiTracks.com ChartBuilder or Sunday Keys?
MultiTracks.com ChartBuilder ships an update monthly, and Sunday Keys every 3 weeks. Most recently, MultiTracks.com ChartBuilder was updated on September 25, 2026 and Sunday Keys on September 18, 2026.

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