Arctic ProSynth vs SL Tune
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Arctic ProSynth
Create bold and tough electronic music with a modern subtractive synthesizer. Explore rich sound design with powerful oscillators, dual filters, and versatile effects. Record and share your creations easily.
- HyperOscillators for fat sounds
- Dual multi-mode filters
- Master effects with adjustable order
- Integrated Vocoder
- 16x4 gated step sequencer
- Live audio and MIDI recording
- Preset and bank sharing
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Be rude. Be rough. Be bold. Be tough! Arctic Pro Synthesizer / Vocoder is a modern subtractive synthesizer. It does not aim to accurately model or re-create vintage synths of yesteryear. Instead Arctic Pro offers the contemporary synthesist a rude, rough, bold and tough palette of sound to get stuck into. Including two massively fat HyperOscillators, dual filters, and easy to re-order master effects. While the Vocoder, used in conjunction with a suitable microphone, adds an extra dimension to your musical performance. HyperOscillators =========== Combine two HyperOscillators and one Sub Oscillator for some seriously fat sounds. Layer up to 8 oscillators in unison to create very thick and powerful tones. Spread detune and Mix these separate oscillators in real-time. More than just a "SuperSaw" - it's also a Super-square and Super-triangle. Powerful Presets =========== Legendary sound designer John ‘Skippy’ Lehmkuhl has exclusively designed the factory presets. John has worked as a professional sound designer since 1988 for Korg - making patches, combinations, drum kits as well as creating the sample data for almost every synth Korg has released since the M1. If you have owned one of these historic synthesizers you have heard John's presets. Sharing ===== Arctic Pro includes everything you need to record and share your audio and MIDI with others. Live record to WAV and MIDI files. Use AudioCopy, open audio directly in apps, or share with Kymatica AudioShare. Presets and Banks can be emailed and transferred via Wi-Fi and iTunes Files Sharing. And of course we also support Audiobus. SPECIFICATION ========== • Synthesis: analog modelling • Polyphony: up to 4 voices • HyperOscillators: 2 per voice, alias free, saw, triangle and square with pulse width, hard sync, ring mod, noise generator, sub-oscillator • Filter: 2 multi-mode resonating filter with 4 filter types and variable routing • Envelopes: mod, filter and amp ADSR envelopes with adjust curve • Modulation: 2 LFOs with multiple wave shapes, sample and hold, 3 routable destinations per LFO, independently sync-able • Effects: stereo master effect processors with adjustable order: 3-band EQ, Distortion, Chorus, Phaser, Vocoder, Delay, Reverb • Arpeggiator: classic arpeggiator with octave shift, MIDI-sync-able • Sequencer: 16 x 4 gated step sequencer with multiple modulation destinations, MIDI-sync-able • Keyboard: glissando, scroll, multi-touch poly pitch bend and aftertouch • Works with Wizdom Music's Geo Synthesizer continuous pitch bend • Polyphonic Aftertouch for use with CME Xkey FEATURES ======== • Inter-App Audio for iOS 7 • Audiobus • AudioCopy 2.0 • MIDI Learn • Live phrase recorder with audio and MIDI export • File and patch sharing via iTunes File Sharing, e-mail and Wi-Fi • Supports external MIDI in and out via CoreMIDI Networking and USB with the Camera Connection Kit • Audio background operation • Virtual MIDI Ports • Open Music App Collaboration compliant Requirements: iPad 2 or later recommended iOS 7.0 or later
SL Tune
This app offers vocal pitch correction and tone effects for music production on iPhone and iPad. It allows precise control over vocal tuning, tone shaping, and echo, with various modes and presets for different vocal styles. The interface is adaptable for different screen orientations and host applications.
- Vocal pitch correction
- Tone shaping effects
- Adjustable echo
- Key and scale selection
- Natural and hard correction modes
- Customizable presets
- Resizable interface
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SL Tune is a vocal pitch-correction and tone effect for iPhone and iPad. Insert it on a vocal track in a compatible AUv3 host. Choose a key and scale, or select the allowed notes yourself. Natural mode preserves small pitch movements, Hard gives faster correction, and Robot locks pitch to the selected root across octaves. Six controls shape the sound: Retune, Humanize, Formant, Snap, Echo and Mix. Formant changes the tonal balance. Mix blends processed and original audio. Start with one of six factory presets: Classic Hard, Trap Lock, Silk Vocal, Clean Fix, Robot Grid and Echo Adlib. Save and load your own presets locally. The resizable interface adapts to portrait, landscape and compact host windows. Use SL Tune as an AUv3 effect in a compatible music host, or open the standalone app to preview and adjust the controls. Pitch correction works best on a single vocal line. It is not designed to tune a complete mix or separate voices from background music.
Screenshots
Verdict
The clearest difference is rating: SL Tune at 5.0 against Arctic ProSynth's 3.3. SL Tune also leads on update cadence (every 11 days vs every 4 months) and review sentiment (100% vs 71%). Arctic ProSynth's advantage is ratings volume (8 vs 1). On ads, in-app purchases, monetization model 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
Arctic ProSynth costs $9.99 and SL Tune $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
SL Tune holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: Arctic ProSynth has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 71% of Arctic ProSynth's written reviews are positive against 100% of SL Tune's.
Arctic ProSynth ships an update every 4 months, SL Tune every 11 days. The most recent releases landed on November 1, 2026 and November 13, 2026 respectively.
| Parameter | Arctic ProSynth | SL Tune |
|---|---|---|
| Price | $9.99 | $7.99 — better |
| Rating | 3.3 (8 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 71.4% of reviews | 100.0% of reviews — better |
| Number of ratings | 8 — better | 1 |
| Update frequency | Every 4 months | Every 11 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 47 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | One Red Dog Media | VIACHESLAV ZHILTSOV |
Customer experience
Arctic ProSynth
SL Tune
In-app purchases
Arctic ProSynth
No in-app purchases
SL Tune
No in-app purchases









