ClassroomScreen is where many teachers already live, and its timer is free with 26 widgets. ClockKeepers is not a better widget board. Its difference is control: the projector shows the clock, and the phone in your hand starts, pauses and adjusts it, so you are not tied to the desk.
A good fit if you want a free all-in-one classroom screen: timer plus a set of other classroom widgets, all on the projector, run from the computer that drives it. The basic plan is free; Pro is $36 a year.
A good fit if you want to run a class timer from your phone while moving around, share one link so students can also see it on their own devices, or run a station rotation on up to 8 timers. It does not replace the rest of ClassroomScreen's widgets.
| ClockKeepers | ClassroomScreen | |
|---|---|---|
| Price | Free for 1 timer, 5 viewers; ClockKeepers Pro is $7.99 once | Basic is free with all 26 widgets including the timer; Pro is $3 a month billed at $36 a year |
| Where you control it | From your phone or tablet; any other screen follows | From the browser tab that is on the projector |
| Students on their own devices | Yes: link, QR or code, 5 free viewers | Not the model of its timer |
| Class presets | Class periods, Pomodoro, speech timer, kids' turns, plus a custom editor | A timer widget alongside other tools. We did not check for presets |
| Other classroom tools | Timers only | 26 widgets in total on the basic plan. It is far ahead here |
| Station rotation | Up to 8 timers on one screen (Pro), phase colors for work and switch | Multiple widgets on one screen |
| Account needed | No | No for the basic plan; Pro needs an account |
| Ads | None | None |
Last checked October 20, 2026. ClassroomScreen details are from its pricing page, fetched in October 2026. We have not tested either product in a classroom, and we did not verify whether ClassroomScreen has any phone-remote mode beyond what its pricing page lists. Prices vary by region and change; check each store for the current figures. A feature we mark as not listed may still exist. ClockKeepers details are from our own listing.
Do not pay for a timer if ClassroomScreen's free one is enough: its basic plan costs nothing and includes the timer. ClockKeepers' free tier also costs nothing; Pro at $7.99 once adds the multi-timer board, branding and a permanent code for a projector bookmark. ClassroomScreen Pro is $3 a month billed as $36 a year and adds saving and sharing screens, custom backgrounds and unlimited name lists.
Only for the timer. ClassroomScreen is a whole set of classroom widgets. ClockKeepers is for teachers who want to control the timer from a phone and let the room follow it on one or more screens.
Yes. Run the timer in the ClockKeepers app on an iPhone or iPad, open the web app on the classroom computer or projector, and type the code. You can then pause or add time from your phone.
Yes. Share the link or QR code and up to 5 students can follow it free; Pro removes the cap.
One timer and five viewers free, no account, no ads. ClockKeepers Pro is $7.99 once.
ClockKeepers