Double Kick vs OnStem
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Double Kick
Transform your device into a professional drum kit. Create beats with high-quality audio and graphics, and customize the layout to match your style. Play along to your favorite music library.
- Studio quality drum kit
- Customizable layout
- High definition graphics
- High quality audio samples
- Excellent response times
- Play along to music library
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Double Kick Pro — the ultimate drum kit experience for iPhone and iPad. Turn your device into a full studio-quality drum kit. Double Kick Pro delivers realistic drum sounds, lightning-fast response times, and a fully customizable layout — so you can play exactly the way your style demands. Whether you're a beginner just discovering the drums or an experienced drummer looking for a mobile practice kit, Double Kick Pro puts the feel of a real drum set right in your pocket. FEATURES: • High-resolution, photorealistic graphics • Studio-quality audio samples • Lightning-fast response times — just like a real drum kit • Fully customizable drum kit layout • Double-kick pedal for demanding drummers • Play along with your favorite tracks from your music library • Optimized for iPhone and iPad • No ads, no distractions With a fully configurable pad layout, Double Kick Pro adapts to your playing style — not the other way around. Place your snare, hi-hats, toms, and kicks exactly where you want them. Perfect for rock, metal, jazz, pop, and everything in between. Work on your rhythms, compose new beats, or just jam out. Download Double Kick Pro now and discover the best mobile drum kit experience on the App Store.
OnStem
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OnStem: AI Music Separation is an on-device AI-powered music separation tool that allows you to split audio tracks into individual stems with privacy and performance in mind. Powered by optimized local inference based on the open-source Spleeter project, OnStem performs all audio processing entirely on your device, without uploading files to any server. Key Features AI Music Separation Separate audio into 2 stems: Vocal and Accompaniment Separate audio into 5 stems: Vocal, Piano, Drums, Bass, and Accompaniment On-Device AI Processing All processing runs locally using on-device AI models No audio files are uploaded or shared Your content stays private on your device Optimized for Long Audio Custom optimizations allow processing of very long audio files Designed for stability and efficiency on mobile devices Multiple Export Formats Export separated tracks as MP3, WAV, M4A, or AAC Easily integrate with other audio tools and workflows Privacy First OnStem is a local-first application. All selected files are processed on your device only. No audio data or personal information is collected, stored, or uploaded. Subscriptions and Purchases OnStem offers both subscription plans and a one-time purchase option. Monthly subscription Quarterly subscription Annual subscription One-time lifetime purchase (where available) Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage or cancel your subscription at any time in your Apple ID account settings. Prices may vary by region and are displayed before purchase. Legal Privacy Policy https://github.com/yangliu-1995/stemify-legal/blob/main/Privacy-Policy/EN.md Terms of Use https://github.com/yangliu-1995/stemify-legal/blob/main/Term-of-Use/EN.md OnStem is designed for creators who value privacy, performance, and on-device AI processing.
Screenshots
Verdict
The clearest difference is price: OnStem at Free against Double Kick's $2.99. OnStem also leads on update cadence (every 3 weeks vs every 8 months). Double Kick's advantage is in-app purchases (none vs 4) and ads (none vs shown). On device support and iOS requirement 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
OnStem is free to download; Double Kick costs $2.99 up front. OnStem sells 4 in-app purchases, starting at $0.99 per month. Double Kick asks for nothing beyond the download.
Double Kick ships an update every 8 months, OnStem every 3 weeks. The most recent releases landed on November 6, 2026 and October 25, 2026 respectively.
| Parameter | Double Kick | OnStem |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.3 (12 ratings) — better | — |
| Positive reviews | 47.1% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Every 8 months | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 29 MB | 137 MB |
| Age rating | 4+ | 4+ |
| Developer | Foobar Creative | 阳 刘 |
Bugs and requests
Double Kick
Reported bugs
9 issues- No sound at all
- App crashes frequently
- App closes when tapping certain areas (e.g., hi-hat pedal)
- Delayed response times
- App exits when trying to play along with music
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- No sound when playing along with music
- No sound from Bluetooth speakers
- Keeps closing down whilst in use
- Very delayed input
Requested features
11 requests- Add Audiobus support
- Add AUV3 compatibility
- More drum sets/kits
- Improve hi-hat sound
- Add sound from cymbal cups
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- Fix Bluetooth issues
- Add volume control for individual drums
- Add recording capabilities
- Add an options menu with different settings
- Option to change drum types for different sounds
- Left-hand option
OnStem
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Double Kick
No in-app purchases
OnStem
- OnStem Pro – Monthly$0.991 Month
- OnStem Pro – Quarterly$2.393 Months
- OnStem Pro – Annual7 Days trial$8.991 Year
- OnStem Pro – Lifetime$9.99









