STEM vs Wormhole
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
STEM
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FUSE VOID STEM-X is the ultimate professional AI audio separation tool, built for producers, DJs, vocalists, and cover artists who demand perfection. Powered by advanced dual-AI hybrid engines, STEM-X extracts studio-quality stems directly on your device. Whether you need a pristine vocal acapella for a remix, a high-fidelity instrumental for karaoke, or an isolated drum groove, STEM-X delivers with industry-leading speed. FEATURES: โข State-of-the-Art AI Engines: Choose between Vocal Priority (2-Stem) or Full Band Extraction (5-Stem). โข Studio In Your Pocket: Process your audio files securely with lightning speed. โข Pro Audio Export: Extract and export uncompressed, high-fidelity stems to your DAW or files. โข Fair Quota System: Only pay for the seconds you extract. No wasted credits on full songs when you only need a loop! โข Minimalist Studio Interface: Designed with a dark, premium aesthetic that feels like high-end studio hardware. Unleash your creativity, practice your covers, and remix the world with FUSE VOID STEM-X. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Wormhole
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Wormhole turns any sound you have into music you made. Drop in a clip โ a video from your camera roll, a voice memo, a file, or something you hum into the mic. Wormhole listens to it, finds the tempo and the key on its own, and chops it into slices you can play. From there you are one tap away from a beat. FIVE INSTRUMENTS, ONE SCREEN Drums, 808, keys, your chopped clip, and a lead โ all on one page. Tap a row to open its notes and draw them straight in. There is no edit mode to learn and no menu tree to climb. If you can tap, you can write a pattern. EVERY NOTE IS IN KEY Wormhole knows what key your project is in and keeps every instrument inside it. You can't place a wrong note. Change the key later and your melodies move with it โ the app remembers the scale degree, not the absolute pitch. THE WORMHOLE Send any sound into the Wormhole and it comes back out in your key. Freeze a single grain into a pad. Smear a vocal into a choir. Stutter a snare into a fill that was never played. It is a scale-locked granular bus, and it is the reason the app is called what it is called. CHOP IT YOUR WAY Slice on transients, slice on the grid, or cut it by hand โ tap the waveform to add a cut, drag a dot to move one. Pick a part of a long clip and chop only that. Every slice gets its own pitch, filter, and length. STUCK? PRESS FLIP One button writes a whole beat โ drums, bass, chords, melody, all in your key, all editable. Press it until something grabs you, then make it yours. LOOPS BECOME A SONG Build up to four versions of every instrument, then place them on a timeline. Drag a block's edge to repeat it. That is the entire arrangement view. POST IT Export a 1080x1920 vertical video with a reactive visual, ready to go straight to your feed. Or take M4A for other apps and 24-bit WAV for your DAW. BUILT PROPERLY Real-time audio engine written from scratch. No login, no account, no cloud, no tracking โ your projects live on your phone. Works fully offline. Something you already have is a beat. It just needs chopping. https://wormhole.aimoxyz.xyz/terms
Screenshots
Verdict
STEM and Wormhole are too close to call on the numbers: across 6 compared parameters โ price, update cadence, ads and in-app purchases among them โ neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. STEM sells 6 in-app purchases, starting at $7.99 per month and Wormhole sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.
STEM ships an update every 9 days, Wormhole every 6 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.
| Parameter | STEM | Wormhole |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 days | Every 6 days โ better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.4 โ better | 17.0 |
| Further details โ not scored | ||
| Size | 3 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | CEM OZAN DUZENCI | Moritz Maximilian Fricke |
In-app purchases
STEM
- Starter Monthly$7.991 Month
- Basic Plan$12.991 Month
- Pro Plan$24.991 Month
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- Basic Plan$99.991 Year
- Pro Plan$199.991 Year
- Energy Token$4.99
Wormhole
- Wormhole Pro Monthly$6.991 Month
- Wormhole Pro Yearly7 Days trial$44.991 Year









