KeyFinder vs Mighty Synth Sampler
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KeyFinder
Identify the musical key of any song you're listening to. Use the integrated piano to play along and confirm notes, helping the app pinpoint the correct key. Explore music theory and learn to play songs in different keys.
- Identify song keys
- Built-in piano keyboard
- Note confirmation
- Narrow down possible keys
- Learn songs in any key
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Ever wondered what the key of a song being played is? Wonder no more! Just use the built-in piano keyboard to play along with a song's melody. As you confirm notes that coincide with what's being played, KeyFinder will narrow down the number of possible keys the song is in. -=-= About Scoreless Music =-=- What's next after knowing a song's key? Why not learn to play that same song in ANY key? Find out more at scorelessmusic.com
Mighty Synth Sampler
Transform any sound into a playable instrument with this powerful synth and sampler. Create custom instruments, layer sounds, and perform with your unique audio creations. Supports SoundFonts and offers advanced synthesis features.
- Three-oscillator synth engine
- 16-slot sampler with loop points
- Audio recording and import
- SoundFont (SF2/SFZ) support
- AUv3 plugins for DAWs
- Downloadable sound packs
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Mighty Synth Sampler turns any sound into a playable instrument. It's a free, fully-featured synth and sampler for iPhone, iPad, and Mac built for musicians who want to create, layer, and perform with their own sounds and SoundFonts (SF2/SFZ). ROMPLERS RULE! The app is built around four pillars: • The Synth A full subtractive synth engine powered by AudioKit. Three independent oscillator layers with volume, semitone, detune, and pan controls. Shape your sound with amplitude and filter envelopes, a low-pass filter, LFO, unison, glide, drive, and more. A built-in arpeggiator, flexible play surfaces, and MIDI support round out a synth that's deep without being overwhelming. • The Sampler Build your own sample-based instruments from scratch. Record directly in the app or import audio files, map them across the keys, set loop points, adjust root notes and note ranges, and save your creations as reusable instruments and banks. • Sound Packs The app comes with a built-in starter bank and supports downloadable sound packs both free and paid. New packs are added to the store without requiring an app update. You can also create your own banks and share them with others. • AUv3 Support Four AUv3 plugins in one app: Mighty Synth (instrument), Mighty Sampler (audio effect for capturing and building instruments), Mighty Effects (standalone effects chain), and Mighty MIDI (MIDI processor and play interface). Load them individually in your favorite DAW or AUv3 host. Features • Free app with all core features included • Three-oscillator synth engine with detune, pan, and semitone control per layer • Amplitude and filter envelopes with per-oscillator scope • Low-pass filter with cutoff, resonance, and key tracking • LFO targeting filter cutoff, pitch, or volume • Unison with up to 8 voices, width, detune, and offset control • Effects: reverb, delay, chorus, drive, phaser, compressor, panner, and more • Built-in arpeggiator with BPM sync, octave range, and pattern modes • Multiple play surfaces: keys, pads, All 4ths layout, scale layout, and more • 16-slot sampler with loop points, root note mapping, and note range editing • Record audio directly in-app • Import audio files and SF2/SFZ SoundFonts • Downloadable sound packs (free and paid) • Create, export, and share your own instrument banks • Four AUv3 plugins: Mighty Synth, Mighty Sampler, Mighty Effects, Mighty MIDI • MIDI CC mapping • Available for iPhone, iPad, and Mac Thank You & Enjoy! Nick Culbertson MobyPixel.com
Screenshots
Verdict
The clearest difference is rating: Mighty Synth Sampler at 4.8 against KeyFinder's 2.7. Mighty Synth Sampler also leads on update cadence (fortnightly vs every 3 months) and review sentiment (83% vs 60%). KeyFinder's advantage is in-app purchases (none vs 3) and ratings volume (322 vs 40). On price, ads 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. Mighty Synth Sampler sells 3 one-off in-app purchases. KeyFinder asks for nothing beyond the download.
Mighty Synth Sampler holds the better App Store score, 4.8 against 2.7. That said, the two scores are not equally well evidenced: KeyFinder has 322 ratings behind it against 40, so its average is the more settled of the two. Written reviews point the same way: 60% of KeyFinder's written reviews are positive against 83% of Mighty Synth Sampler's.
KeyFinder ships an update every 3 months, Mighty Synth Sampler fortnightly. The most recent releases landed on October 8, 2026 and October 11, 2026 respectively.
| Parameter | KeyFinder | Mighty Synth Sampler |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (322 ratings) | 4.8 (40 ratings) — better |
| Positive reviews | 60.0% of reviews | 83.3% of reviews — better |
| Number of ratings | 322 — better | 40 |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 11.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 5 MB | 158 MB |
| Age rating | 4+ | 4+ |
| Developer | Scoreless Music | Moby Pixel |
Customer experience
KeyFinder
Mighty Synth Sampler
Bugs and requests
KeyFinder
Reported bugs
4 issues- No sound
- Slow response to touch
- Cannot play minor scales in Ref mode
- Difficulty controlling volume with background music
Requested features
8 requests- Bring the app back
- Update to 64bit
- Label notes on piano keys
- Ability to move up and down the keyboard
- More keys supported (hundreds)
Show 3 moreShow fewer
- Control app volume separately from music
- Show relative minor next to major
- Make a music notation application
Mighty Synth Sampler
Not enough reviews yet to summarise bugs or requests.
In-app purchases
KeyFinder
No in-app purchases
Mighty Synth Sampler
- Vintage Synth Sound Pack$4.99
- Super Chiptune Sound Pack$4.99
- Tape Drift Sound Pack$4.99
Questions
Is KeyFinder free?
Is Mighty Synth Sampler free?
Which has better reviews, KeyFinder or Mighty Synth Sampler?
Do KeyFinder or Mighty Synth Sampler have ads?
Which is updated more often, KeyFinder or Mighty Synth Sampler?
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