Comparison

Classroom Timer Pro vs Otso

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Classroom Timer Pro

This educational tool helps teachers manage timed tasks for groups of children. It offers customizable themes, background countdowns, and engaging animations for task completion or time expiration. Users can pause, restart, and reset timers, with optional sound effects.

Highlights
  • 50+ alarm/background theme combinations
  • Background countdown functionality
  • Elapsed and remaining time display
  • Actual time display
  • "Well Done" screen with fanfare
  • Comic explosion or "Time's Up" animation
  • Pause, restart, and reset timer
Features
Read full description

A Simple, Fun Timer, designed for teachers - or anyone else who needs to set timed tasks for groups of children in a classroom or similar environment. Classroom Timer Pro includes the following features: • To keep things fresh there are over 50 Alarm clock / Background theme combinations (with more to come!) • The app can continue to countdown in the background, so you can switch between applications during the countdown. This is configurable in the apps settings screen. • No Adverts from third parties. • Displays the amount of time elapsed on the main app screen, as well as the amount of time left -this can be enabled / disabled from the settings screen. • Show the actual time on the main app screen - this can be enabled / disabled from the settings screen. How does it work? The user sets the target amount of time for the class/group to perform a particular task. The countdown timer is then started. The timer can be viewed from the Apple device itself or displayed on a larger format device such as an interactive board or TV screen using screen mirroring features of the Apple Devices. If the class completes the task in the defined time limit the teacher can tap the "tick" button and the "Well Done" screen is displayed and a fanfare sound effect is played. However, if the class run out of time the Alarm rings on the clock, the clock bounces around the screen. Then either: 1. The clock explodes in a comic fashion or 2. A "Time's Up" animation is displayed. ... simply select which effect is used. This app really encourages students to complete any assigned task, the students can see graphically how much time they have left to complete the task. The user is able to pause, restart and reset the timer at any time. The app has an audible "ticking" sound when the timer is running, this can be enabled or disabled by tapping the speaker button on the apps main screen. The Fanfare and Explosion sound effects can be controlled via the audio controls on the Apple device. This is a simple but fun and engaging app to assist the teacher in their classroom management activities. As with all our apps, users are able to send feedback, make enhancement requests or report any issues directly to us from inside the app.

About

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.

Highlights
  • Visual countdown wedge
  • Customizable faces and sounds
  • Dynamic Island and Lock Screen integration
  • No ads or subscriptions
  • Private by design
  • Tactile feedback and animations
Features
Read full description

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 • 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 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. On iPhone and iPad, tilting the device changes the reflections. On Mac, they follow the pointer. 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

Classroom Timer Pro4 screens
Otso4 screens

Verdict

The call

The clearest difference is review sentiment: Otso at 100% against Classroom Timer Pro's 43%. Otso also leads on rating (5.0 vs 3.6) and update cadence (every 3 weeks vs every 5 months). Classroom Timer Pro's advantage is ratings volume (9 vs 1) and iOS requirement (9.0 vs 18.0). On ads, in-app purchases, monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Classroom Timer Pro costs $2.99 and Otso $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Otso holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: Classroom Timer Pro has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 43% of Classroom Timer Pro's written reviews are positive against 100% of Otso's.

UpkeepUpdate frequency

Classroom Timer Pro ships an update every 5 months, Otso every 3 weeks. The most recent releases landed on October 7, 2026 and October 11, 2026 respectively.

Scorecard6 real differences · 4 level
Classroom Timer Pro versus Otso: the parameters behind the verdict, then further details
ParameterClassroom Timer ProOtso
Price$2.99$0.99 — better
Rating3.6 (9 ratings)5.0 (1 ratings) — better
Positive reviews42.9% of reviews100.0% of reviews — better
Number of ratings9 — better1
Update frequencyEvery 5 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, Mac, Apple Watch — better
Requires iOS9.0 — better18.0
Further details — not scored
Size107 MB5 MB
Age rating4+4+
DeveloperEDTECH MONSTER LIMITEDSIMON HEUSCHKEL

Customer experience

Classroom Timer Pro

All ratings9 ratings
Positive55.6%
Neutral22.2%
Negative22.2%
Written reviews21 reviews
Positive42.9%
Neutral14.3%
Negative42.9%

Otso

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Classroom Timer Pro

No in-app purchases

None

Otso

No in-app purchases

Questions

Is Classroom Timer Pro free?
Classroom Timer Pro costs $2.99, with no in-app purchases.
Is Otso free?
Otso costs $0.99, with no in-app purchases.
Which has better reviews, Classroom Timer Pro or Otso?
Otso is rated higher. Classroom Timer Pro averages 3.6 out of 5 from 9 ratings, while Otso averages 5.0 from 1 ratings.
Do Classroom Timer Pro or Otso have ads?
Neither Classroom Timer Pro nor Otso shows ads.
Which is updated more often, Classroom Timer Pro or Otso?
Classroom Timer Pro ships an update every 5 months, and Otso every 3 weeks. Most recently, Classroom Timer Pro was updated on October 7, 2026 and Otso on October 11, 2026.

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