Comparison

SampleTank CS 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

SampleTank CS

This professional mobile sound and groove workstation brings desktop-level virtual instrument power to your iPhone and iPad. It offers a vast array of world-class instruments and patterns for live performance and composition, with expandable sound libraries available for purchase.

Highlights
  • 23 free instruments in 16 categories
  • 8-part multitimbral sound module
  • Expandable sound library with 2300+ instruments
  • Over 1,200 melodic and rhythmic patterns
  • 8-track MIDI recorder with audio export
  • Intuitive interface and new sound engine
  • Song and Live environments
Read full description

SampleTank 2 for iOS is a professional, fully featured mobile sound and groove workstation that brings the sound, power and features of desktop virtual instruments to your iPad and iPhone — without compromise. It is designed for professional live performance, song composition and puts a comprehensive array of world-class instruments, sounds and patterns right at your fingertips. SampleTank CS provides all the functionality of the full app, with 23 instruments in 16 categories, so you can try out this powerful workstation for free. Additional sounds are available a la cart via in-app purchase. SampleTank gives you 8 multitimbral instrument slots that you can easily layer or split. Choose from a comprehensive, expandable sound collection that covers virtually every acoustic and electronic sound imaginable. Plus, each instrument category includes instrument riffs and grooves so you can start composing and playing in no time. The included instruments and the new sound engine are derived from the desktop version of SampleTank, IK's flagship workstation, offering you unmatched realism, variety of sound and audio performance. For the first time on iOS, thousands of professional sample-based sounds and patterns can be easily accessed, layered and used for playing live or in the studio. What’s more, SampleTank offers an ever-growing library of sounds and are available via in-app purchase: • Elektronika - a series of electronica and EDM-oriented groove libraries and sound collections that make it easy to create hits in today’s most popular styles • Miroslav Philharmonik — the legendary orchestral libraries, now available on your mobile device! Stunningly realistic and expressive samples of a wide range of orchestra and percussion instruments. • SampleTank PRO - the latest and most high-end sounds and grooves available, letting you create professional-grade compositions on your mobile device • Plus additional libraries covering cinematic sounds, the finest pianos, drum libraries from iconic drummers and much more! SampleTank for iOS offers over 2,300 instruments and over 1,200 MIDI patterns — the largest collection of sounds available for any virtual instrument for iOS. Features: • 23 sounds in 16 categories included free • 8-part multitimbral professional quality sound and groove module • Expandable sound library with 2300+ instrument • Over 1,200 melodic and rhythmic patterns • 8-track MIDI recorder with audio export • Totally redesigned intuitive interface • New sound engine derived from SampleTank 3 for Mac/PC • Zones feature lets you easily create splits & layers on your controller • Song and Live environments for composing and playing • Built-in insert effects and master reverb • MIDI learn feature makes programming external controllers easy • Plug-and-play compatibility with iRig interfaces and controllers • Polyphony: up to 64 voices on new Apple devices

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

SampleTank CS4 screens

Verdict

The call

The clearest difference is rating: Sunday Keys at 4.6 against SampleTank CS's 3.1. Sunday Keys also leads on review sentiment (71% vs 29%) and in-app purchases (none vs 15). SampleTank CS's advantage is iOS requirement (13.0 vs 15.0). On price, ratings volume, ads and monetization model 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. SampleTank CS sells 15 one-off in-app purchases. Sunday Keys asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Sunday Keys holds the better App Store score, 4.6 against 3.1. Both are backed by a comparable volume of ratings — 144 and 115 respectively. Written reviews point the same way: 29% of SampleTank CS's written reviews are positive against 71% of Sunday Keys's.

UpkeepUpdate frequency

SampleTank CS ships an update every 2 months, Sunday Keys every 3 weeks. The most recent releases landed on October 13, 2026 and October 9, 2026 respectively.

Scorecard5 real differences · 5 level
SampleTank CS versus Sunday Keys: the parameters behind the verdict, then further details
ParameterSampleTank CSSunday Keys
PriceFreeFree
Rating3.1 (144 ratings)4.6 (115 ratings) — better
Positive reviews28.9% of reviews70.9% of reviews — better
Number of ratings144 — better115
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPad, Mac
Requires iOS13.0 — better15.0
Further details — not scored
Size1.5 GB201 MB
Age rating4+4+
DeveloperIK Multimedia US, LLCLoop Community

Customer experience

SampleTank CS

All ratings144 ratings
Positive52.1%
Neutral8.3%
Negative39.6%
Written reviews298 reviews
Positive28.9%
Neutral10.4%
Negative60.7%

Sunday Keys

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

User reviews

SampleTank CS

From 144 App Store ratings

What we love

  • 🚀 Great sound quality
  • 👍 Easy to use
  • 💡 Excellent for live performances

Room to improve

  • 🐛 Frequent crashes
  • 🔒 Issues with in-app purchases and restoring purchases
  • 🔋 High memory usage
  • 👎 Lack of updates and support

Sunday Keys

From 115 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

SampleTank CS

Reported bugs

3 issues
  • Incompatible with latest iOS versions
  • MIDI issues and lack of device detection
  • Purchased content not properly restored

Requested features

4 requests
  • Add AU/AUv3 support for better DAW integration
  • Improve MIDI functionality and mapping
  • Allow importing custom samples
  • Enhance performance controls (e.g., pitch bend, modulation)

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

15 purchases

SampleTank CS

One-time15
  • Organ$4.99
  • Strings$4.99
  • Brass$4.99
Show 12 more
  • Synth Leads$4.99
  • Synth Pads$4.99
  • Woodwinds$4.99
  • Acoustic Drums$4.99
  • Electric Piano$7.99
  • The Grid$14.99
  • Upgrade to SampleTank$24.99
  • Miroslav Philharmonik - Mobile Edition$24.99
  • Sample Moog - Mobile Edition$24.99
  • Sonik Synth - Mobile Edition$24.99
  • All Sounds$64.99
  • SampleTank PRO - All Sounds Pack$64.99
None

Sunday Keys

No in-app purchases

Questions

Is SampleTank CS free?
SampleTank CS 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, SampleTank CS or Sunday Keys?
Sunday Keys is rated higher. SampleTank CS averages 3.1 out of 5 from 144 ratings, while Sunday Keys averages 4.6 from 115 ratings.
Do SampleTank CS or Sunday Keys have ads?
Neither SampleTank CS nor Sunday Keys shows ads.
Which is updated more often, SampleTank CS or Sunday Keys?
SampleTank CS ships an update every 2 months, and Sunday Keys every 3 weeks. Most recently, SampleTank CS was updated on October 13, 2026 and Sunday Keys on October 9, 2026.

Other comparisons