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 colored wedge shrinks as time runs down. See how much is left at a glance, without having to read the numbers or do the math. Buy once and use it on iPhone, iPad, Apple Watch, and Mac. No ads, no subscriptions, no account. No tracking or data collection. MAKE IT YOURS • Choose a dial maximum of 5, 10, 15, 30, 60, or 120 minutes • Count clockwise or counterclockwise • Adjust sound and haptic feedback on supported devices ON iPHONE AND iPAD • Drag the dial to set a timer; tap to start, pause, or resume • Turn the dial with two fingers, like a real knob • Smooth dialing at up to 120 Hz on ProMotion displays • Swipe beside the dial to change faces, or swipe up for settings • Check the countdown on the Lock Screen and, on supported iPhones, in the Dynamic Island • Keep the screen awake while the timer is running in the foreground • Receive a finish notification in the background when notifications are enabled • Made for iPhone Duo: Otso fills the whole display, closed or open, and keeps the dial clear of the fold and the status items • Half folded, the countdown gets one side of the screen and the dial stays on the other • Works in Split View: put Otso next to another app, and the dial adapts as you resize it ON APPLE WATCH All fifteen faces, right on your wrist. Turn the Digital Crown to set the time, tap to start or pause, swipe left or right to change faces, and swipe up for settings. The Watch timer works independently of the iPhone timer. ACCESSIBILITY VoiceOver labels and timer actions, keyboard controls on Mac and iPad, and animations that adapt to Reduce Motion. DETAILS YOU CAN FEEL Each face has its own sounds: Wood knocks, Glass chimes, and LCD clicks like a watch button. Flick the dial and it spins on, clicking past each mark as it slows to a stop. The faces catch the light like real objects: tilt your iPhone or iPad, or move the pointer on Mac, and the glass glints, shadows deepen under the rim and the knobs, and Neon’s glow floats behind its tube. Party celebrates with confetti, while Aurora adds a soft shimmer. Motion effects are reduced when Reduce Motion is on. FIFTEEN FACES Each has its own character. • Classic — charcoal body, glass lens, red disc • Pastel — soft candy colors and a textured knob • Rainbow — lilac, with an arc that shrinks color by color • 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 glow against the dark • Aurora — a curtain of light over a starfield • Party — a frosted cake that bursts into confetti Otso takes its name from the bear of Finnish folklore. A timer should sit quietly in the room and be understood at a glance. For lessons, workshops, exams, focused work, homework, and cooking — whenever it helps to see time passing.
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 11 days vs monthly). On ads 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 monthly, Otso every 11 days. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.
| Parameter | Audiator | Otso |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Monthly | Every 11 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Paid |
| Best chart rank | — | #170 — better |
| Devices | iPhone, iPad | iPhone, iPad, Mac, Apple Watch — better |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 23 MB | 5 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









