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 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

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 update cadence (every 5 days vs every 5 months) and price ($0.99 vs $2.99). Classroom Timer Pro's advantage is 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.

UpkeepUpdate frequency

Classroom Timer Pro ships an update every 5 months, Otso every 5 days. The most recent releases landed on September 19, 2026 and September 25, 2026 respectively.

Scorecard4 real differences · 6 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) — better—
Positive reviews42.9% of reviews100.0% of reviews — better
Number of ratings9 — better—
Update frequencyEvery 5 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS9.0 — better18.0
Further details — not scored
Size107 MB2 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

Written reviews1 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.
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 5 days. Most recently, Classroom Timer Pro was updated on September 19, 2026 and Otso on September 25, 2026.

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