VOSIS Pro vs practice cents
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VOSIS Pro
Transform images into unique sounds and compose visual music. This tool offers advanced filters and MIDI control for experimental sound design and creative audio manipulation.
- Image to sound conversion
- Advanced image filters
- MIDI keyboard support
- Customizable presets
- Unlimited recording
- Video file loading (iPad/Desktop)
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VOSIS is a synthesizer combining audification of greyscale pixel data with several image filters. It is a tool for image sonification, visual music composition, and experimental sound design. The audification of pixel luminance values creates shape-timbre relationships. Pixel scan rate is controlled in terms of note interval, octave, and scale to give varying pitch between image regions. The ADSR envelope allows one to play images as a non-linear sequence of pitches with varying wavetable/timbre. VOSIS Pro adds several features to VOSIS useful for sound designers and musicians: Save and load custom presets, connect a MIDI keyboard and play regions with keys, map any control and region positions to MIDI CC, unlimited recording and screen mirroring with no watermark, downsampling/blur/sharpen, and tremolo filters, subdivide large regions into step sequence mode, load video files (iPad and Desktop versions only). Visit vosis.app for sound example, demo videos, and user guide!
practice cents
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practice cents is a practice lab for band and orchestra — tuner, metronome, record, journal, and ear training in one app for iPhone, iPad, and Apple Silicon Mac. Start free. Stay free for everyday work. Unlock Pro when you need contest-shaped tools. TUNER Chromatic tuner built for winds and strings. Play a note — the living gauge shows how close you are. Set your instrument key (Bb, Eb, F, and more). Equal temperament is always free. Optional tone: one pitch, plus a fifth. On iPad, Tuner and Metronome sit side by side. METRONOME Simple meters, accents, subdivisions, and tap tempo. Start and keep time without hunting through menus. Opening the Met tab does not start the click — you press Start. RECORD & JOURNAL Capture takes (manual or Listen). Keep practice notes, voice memos, and weekly rhythm. Optional iCloud Sync keeps settings, journal, recordings, and HYKOM scores with your Apple ID across your devices. Turn Sync off to stay local. HYKOM How’s Your Knowledge Of Music — short ear and theory rounds. Free samples: Intervals, Pitch Match, and Key Signatures. Full catalog is Pro. HOME SCREEN & CONTROL CENTER Tuner and Streak widgets. Control Center: Start Tuner, Metronome (opens the Met tab), Start Record. Siri and Shortcuts too. Dynamic Island and widgets are iPhone and iPad — not Mac. ALWAYS FREE • Equal-temperament chromatic tuner • Instrument key / transposition • Single-pitch tone (+ fifth) • Simple metronome • Record + Listen • Practice journal • HYKOM samples (Intervals, Pitch Match, Key Signatures) • Forest home-screen icon PRACTICE CENTS PRO Serious tools when you want them. Auto-renewable subscription. • MM Mode — delayed-feedback practice, multi-pitch results, piano A/B, scores • Just & Pythagorean temperament (Equal stays free) • Multi-pitch tone — stack up to four pitches for interval and chord drones • Custom mixed-meter maps — build, save, share • Full HYKOM catalog and sessions • Home Screen icons — Mist, Graphite, Space (Forest stays free) Try Pro free for 7 days with the yearly plan, then $29.99/year. Or $4.99/month, no trial. Payment is charged to your Apple ID. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel in Settings -> Apple ID -> Subscriptions. Restore Purchases anytime with the same Apple ID. Privacy: https://practicecents.com/privacy Support: https://practicecents.com/support Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: practice cents at Free against VOSIS Pro's $7.99. practice cents also leads on update cadence (every 3 days vs every 3 months). VOSIS Pro's advantage is in-app purchases (none vs 2) and device support (4 vs 2). On ads 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
practice cents is free to download; VOSIS Pro costs $7.99 up front. practice cents sells 2 in-app purchases, starting at $4.99 per month. VOSIS Pro asks for nothing beyond the download.
VOSIS Pro ships an update every 3 months, practice cents every 3 days. The most recent releases landed on October 9, 2026 and October 4, 2026 respectively.
| Parameter | VOSIS Pro | practice cents |
|---|---|---|
| Price | $7.99 | Free — better |
| Rating | 4.6 (7 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 3 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 12 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Life Orange LLC | Phillip Holland |
In-app purchases
VOSIS Pro
No in-app purchases
practice cents
- practice cents Pro$4.991 Month
- practice cents Pro7 Days trial$29.991 Year









