Browser-based all-in-one: stems, BPM, key, Camelot, chord detection, MIDI export, LUFS, plus 4 live mic tools. Free with daily caps; ad-free on every tool page. No app to install.
Moises bundles stem splitting, key detection and chord pull into a $5-9/month subscription with monthly caps. SignalKey gives you the same set free, plus MIDI export and live tools, in the browser.
No spin — what each tool actually does and where the lines are drawn.
Browser-based all-in-one: stems, BPM, key, Camelot, chord detection, MIDI export, LUFS, plus 4 live mic tools. Free with daily caps; ad-free on every tool page. No app to install.
Mobile + web app for musicians. Excellent practice features (loops, slow-down, pitch shift on stems). Subscription-based ($5-9/mo) with monthly upload caps and 'Premium' features locked behind tier. Best-in-class for practice workflows on iPad.
Moises has a usable free tier for casual users; SignalKey's free tier is unlimited.
What each tool does, what it doesn't, and where the gaps are honest.
| Feature | SignalKey | Moises |
|---|---|---|
| BPM detection | ||
| Key detection | ||
| Camelot Wheel notationMoises shows key but doesn't surface Camelot codes prominently. | ||
| Chord detection | ||
| Audio → MIDI | ||
| LUFS / mastering checks |
| Feature | SignalKey | Moises |
|---|---|---|
| 4-stem split | ||
| 6+ stem splitMoises Premium+ offers up to 6 stems. | ||
| Per-stem volume / mute in player | ||
| Pitch shift on stems | ||
| Tempo change on stems |
| Feature | SignalKey | Moises |
|---|---|---|
| Section loop / A-B repeat | ||
| Mobile app | ||
| Live tuner | ||
| Live metronome with subdivisions | ||
| Spectrum analyzer | ||
| Tap tempo |
| Feature | SignalKey | Moises |
|---|---|---|
| Free tier monthly cap | Unlimited | 5 tracks / month on Free |
| Premium price | Free with caps · $19/mo Studio | $5-9/mo subscription |
| Watermarks on free tier |
Both tools are good. The right answer depends on what you're actually doing.
If you're already paying — here's the cleanest way to switch without losing work.
If 80% of your usage is 'detect BPM and key, get stems' — SignalKey covers that for free, no caps. If you mostly use Moises to loop sections of a song while practising, stay on Moises for that workflow.
Cancel through Moises' settings. Your downloaded stems remain — SignalKey doesn't need migration; it's a separate tool.
Drop a track in to verify the analysis matches what Moises showed. The BPM and key should be identical or within 1 BPM / relative-key tolerance.
MIDI export, LUFS check, chord finder — all features Moises doesn't ship. If you produce, this is the upside of switching.
On 4-stem splits, very close. Both use modern source-separation models. Moises Premium+ has a 6-stem option with isolated guitar / piano that SignalKey doesn't currently match.
Methodology: Researched April 2026 against the public Moises tier table and feature documentation. Pricing in the Moises camp reflects standard monthly billing. If anything in this comparison reads as inaccurate, please email hello@signalkey.io and we'll update.
Drop a song and see the analysis pass — BPM, key, Camelot, stems, MIDI, LUFS — in one go. Free forever.