Audiator vs Otso
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Audiator
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With Audiator, you can systematically learn solfège while simultaneously improving your musicality. With these audiation exercises, you train your ear and your inner sense of pitch, to respond musically with voice or instrument, and your understanding of music. Make music with this app: basics and chords in major and minor. The app sings for you on neutral or sofège syllables, you can directly imitate that and receive feedback, if the notes were in tune. Playfully learn to hear and understand the inner connections through solfège syllables. What you can sing yourself, you understand much better than if you count notes. The app supports you doing so. Additionally, you can play along with all exercises on your instrument, and the app recognizes different octaves. To learn the language of music, you ideally don't start with musical notation and theory, but with practice: listening, singing, making music. You can practice the little parts of music (patterns) here as musical vocabulary, even before written notation comes into play. Edwin E. Gordon has extensively researched and described this in his Music Learning Theory. On the start page, you get suggestions for what you can practice or review next. Upgrade to Audiator PRO: Practice 10 more units (100 exercises) in your app and create 100 of your own individual units. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service for Audiator PRO: https://www.audiator.app/terms.html
Otso
This app provides a visual countdown timer that uses a shrinking colored wedge instead of numbers. It offers various aesthetic designs and tactile feedback, making time management intuitive for all ages. The app is designed for privacy with no accounts or data collection.
- Visual countdown wedge
- Customizable faces and sounds
- Dynamic Island and Lock Screen integration
- No ads or subscriptions
- Private by design
- Tactile feedback and animations
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A coloured wedge shrinks as the time runs down. Everyone in the room can read it at a glance — no numbers, no arithmetic, nobody asking how long is left. One price, once — iPhone, iPad and Mac. No ads, no subscriptions, no account. SET IT UP • Maximum: 5, 10, 15, 30, 60 or 120 minutes • Clockwise or counter-clockwise • Sound and haptics, each switched separately: dial, alarm, interface • The countdown carries on in the Dynamic Island and on the Lock Screen • The screen stays awake while it runs • It keeps real time with the app closed PRIVATE BY DESIGN No account. No tracking. No data collected. Pay once, keep it. HOW IT FEELS • Drag the dial or twist the knob. It ratchets, click by click • Tap to pause, tap to carry on • At zero it shakes, rings and buzzes, like a kitchen timer • Every face sounds different: walnut knocks, glass rings, LCD clicks like a watch button • Flick the dial and it spins down to a stop • Hit either end and it thuds — you feel the limit • Tilt the phone and the polished faces catch the light • Party bursts into confetti. Aurora shimmers while you work FIFTEEN FACES Each has its own character. • Classic — charcoal body, glass lens, red disc • Pastel — candy-soft toy, knurled knob • Rainbow — lilac, an arc that shrinks colour by colour • Neumorph — soft, sculpted, quiet • Glass — translucent, on a light wall • Flat — pure, bold, no chrome • Paper — warm stationery, an ink needle • Wood — turned walnut, terracotta wedge • LCD — dot matrix on a backlit sage screen • Rugged — machined blades behind thick rubber • Midnight — black with a hot coral glow • Halo — a glowing amber ring • Neon — a magenta tube humming in the dark • Aurora — a curtain of light over a starfield • Party — a frosted cake that bursts into confetti Otso is a bear, named for the forest king of Finnish folklore. A timer should sit quietly in the room and be understood without a word. For lessons, workshops, exams, focus sessions, homework and cooking — and anyone who thinks better when time is visible. Children read it as easily as adults.
Screenshots
Verdict
The clearest difference is price: Audiator at Free against Otso's $0.99. Otso's advantage is in-app purchases (none vs 2) and update cadence (every 5 days vs every 3 weeks). On ads, device support 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
Audiator is free to download; Otso costs $0.99 up front. Audiator sells 2 in-app purchases, starting at $3.99 per month. Otso asks for nothing beyond the download.
Audiator ships an update every 3 weeks, Otso every 5 days. The most recent releases landed on September 9, 2026 and September 25, 2026 respectively.
| Parameter | Audiator | Otso |
|---|---|---|
| Price | Free — better | $0.99 |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Every 3 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Paid |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 22 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | STEFAN MATHEAS | SIMON HEUSCHKEL |
In-app purchases
Audiator
- Audiator PRO$3.991 Month
- Audiator PRO$34.991 Year
Otso
No in-app purchases









