DrumKnee 3D Drums vs SUS4 Loop Builder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DrumKnee 3D Drums
Experience realistic 3D drumming with foot-controlled bass. Record, share, and play along with drumless tracks. Customize your kit with professional sounds and stylish skins for an immersive music experience.
- Realistic 3D drum set
- Foot-controlled bass drum
- Record and share songs
- Play along with drumless tracks
- Customizable drum kits
- Low latency response
- Chokable cymbals
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DrumKnee is the most realistic drums app. Now you can play the bass with your foot. Perfect for on-the-go drumming! It is like having a real drum set in the palm of your hands. Play drums, record, and share your songs with the DrumKnee 3D community. The new Splitteroo integration lets you remove drums from your favorite songs, create custom drum kits with the separated snare and kick sounds, and play along with the track for an immersive drumming experience! DrumKnee is very different from any other app out there: First of all, it is a well-polished real drum app in 3D (how cool is that?). In addition, you get to trigger the bass sound with your foot. That's right, just rest your phone/tablet on your knee and kick it!! Mix and match the sounds so you can build your own custom drum set!! Features: Professionally recorded sounds. Very low latency response. The best one out there. The delay between your tap on the screen and the sound is incredibly low. Most realistic drums app. You will feel just like playing a real drum. Cymbals are also chokable by holding your finger on them when played. Play along with select drumless songs. You can record your masterpiece and share it with friends. Many stylish skins for you to choose from. Jazz/Funk drum set DK Music is another feature available. This service is a separate monthly fee that allows you to download drumless tracks directly to the app to play along with. SUBSCRIPTION OPTIONS - Subscribe for unlimited access to the full drumless (songs without drums) songs library for the duration of your subscription - Subscriptions are monthly, quarterly and yearly - 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 - Account will be charged for renewal within 24-hours prior to the end of the current period - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings - No cancellation of the current subscription is allowed during active subscription period - Any unused portion of a free trial period will be forfeited when the user purchases a subscription - You can read our privacy policy at https://drumknee.wordpress.com/policy/ *Price is equal to the value that "Apple's App Store Matrix" determines is the equivalent of the subscription price in USD. https://drumknee.wordpress.com/termsofservice
SUS4 Loop Builder
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Build a song one loop at a time. A looper and multitrack overdub tool for guitar, vocals and anything with a mic. Layer parts, keep them in time, and export stems when the idea is worth finishing. SUS4 Loop Builder is a multi-track looper for building song ideas from scratch. Record a bass line into the first layer, layer a chord progression over it, add a melody on top, and keep going until the idea has a shape. Each layer has its own level and effect controls so the mix develops as you build. When you have something, export the full mix or individual stems to your DAW for proper production. The loop library saves your builds so you can come back to them, reference them, or share a stem with a collaborator. • Multi-track looping — record and layer on top of previous loops • Per-layer level and effects controls • Loop library for saving and revisiting ideas • Stem export — export individual layers or the full mix • Multi-track export to your DAW • Subscribe monthly, or unlock the full SUS4 suite forever: unlimited loops, multi-track export, per-layer effects, and the full loop library All recording stays on your device. No audio is uploaded. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: SUS4 Loop Builder at none against DrumKnee 3D Drums's shown. DrumKnee 3D Drums's advantage is update cadence (weekly vs monthly) and chart position (#185 vs unranked). On price, 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
Both are free to download. DrumKnee 3D Drums sells 11 in-app purchases, starting at $4.99 per month and SUS4 Loop Builder sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
DrumKnee 3D Drums ships an update weekly, SUS4 Loop Builder monthly. The most recent releases landed on October 16, 2026 and October 12, 2026 respectively.
| Parameter | DrumKnee 3D Drums | SUS4 Loop Builder |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (16K ratings) — better | — |
| Positive reviews | 81.2% of reviews | — |
| Number of ratings | 16K — better | — |
| Update frequency | Weekly — better | Monthly |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Best chart rank | #185 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 89 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Music4Fun LLC | Paul Smith |
Bugs and requests
DrumKnee 3D Drums
Reported bugs
3 issues- Drum kit customization not working as expected
- Subscription issues and inability to restore purchases
- Crashes and freezes when playing for extended periods
Requested features
5 requests- Ability to customize drum kit layout
- More advanced drum techniques (e.g. double bass, ghost notes)
- Integration with music production software like GarageBand
- Additional drum kit and song library updates
- Rechargeable and wireless DK Sense pedal
SUS4 Loop Builder
Not enough reviews yet to summarise bugs or requests.
In-app purchases
DrumKnee 3D Drums
- 1 Month DrumKnee Premium3 Days trial$4.991 Month
- 3 Months DK Music$9.993 Months
- 1 Year DrumKnee Premium$29.991 Year
- Pack 12 variants$2.99
- Pack 42 variants$2.99
- Jazz/Funk Pack$2.99
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- Electro Pack$2.99
- Pack 2$2.99
- Rock Pack$3.99
- Metal Pack$3.99
- DrumKnee PRO$5.99
SUS4 Loop Builder
- SUS4 Loop Builder Pro Monthly$0.991 Month
- SUS4 All-Access7 Days trial$4.991 Month






