Comparison

Screen Mirroring ® vs ClockKeepers

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

Head to head
About

Screen Mirroring ®

Seamlessly mirror your phone's screen to your Smart TV with zero delay. Cast photos and videos directly from your device's camera roll. No extra hardware is required for this universal solution.

Highlights
  • Zero-delay screen mirroring
  • Cast photos and videos
  • No additional hardware needed
  • Universal TV compatibility
Features
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Mirror your phone screen or cast photos and videos to your Smart TV. Features: - Mirror your screen with zero delay to your TV or other device. - Cast photos & videos from your Camera Roll. - No additional hardware needed. - Works universally with most TV's.

About

ClockKeepers

Features
Read full description

Put the workout clock on the gym TV. ClockKeepers runs your Tabata, HIIT, EMOM or boxing rounds on your phone and shows the same clock, live, on every TV, tablet and phone in the room. Start a countdown, stopwatch or interval program, tap Broadcast, and every phone, tablet or TV browser that opens your link shows the same clock, in sync, with the phase colour and round count. No mirroring, no cables, no app needed on the big screen: open clockkeepers-app.netlify.app on any TV browser and type the 5-letter code. BUILT FOR REAL ROOMS • Gyms and studios: Tabata, HIIT, EMOM, AMRAP, boxing and MMA rounds, "For time" with a cap. Work and rest flood the screen green and red so nobody has to squint. • Classrooms: 5, 10, 15 and 20-minute periods, focus sessions, a speech timer that turns amber and red as time runs out. Control it from your phone while you walk the room. • Courts and tournaments: round clocks with changeover breaks, "Round 3 of 8", one board for every court. • Home: kids' turns, cooking, board games. WHY COACHES AND TEACHERS SWITCH • Broadcast to any screen with a link, QR code or short code. Viewers never install anything. • Sound that actually plays: 3-2-1 beeps, segment tones, a spoken 10-second countdown and a finish alarm that keeps ringing until you tap, even with the silent switch on. • The screen never sleeps while a timer runs, and a notification fires if the app is in the background when time is up. • Let others control the clock (optional): pass the link to an assistant coach and either of you can pause. • Custom interval builder: up to 12 segments per round, 99 rounds, a get-ready period, labels and colours. • Presets for the programs people actually run. One tap and go. • Session log of what you ran and for how long. • On an iPad, run the timer and the controls side by side, or tap Present to fill the screen. • AirPlay or plug into a TV: the board fills the screen and the controls stay on your device. • No ads. No subscription. No account. CLOCKKEEPERS PRO (one-time purchase, no subscription, shown in your own currency) • Up to 8 timers on one board: stations, courts or groups, with Start all / Pause all, laid out automatically on the TV. • Your gym, class or event name, colours and logo on every screen. • A permanent code (like "ironworks") so the TV bookmarks one link forever. • Nine more display themes: LED, Stadium, Neon, Chalk, Minimal, Sunset, Aurora, Dot Matrix, Blueprint. • Sound packs: gym horn, ring bell, whistle, arcade. • Unlimited viewers, saved presets and session history. No watermark. From the makers of ScoreKeepers, RankKeepers, PickKeepers and QuizKeepers.

Screenshots

Screen Mirroring ®1 screens
ClockKeepers4 screens

Verdict

The call

The clearest difference is in-app purchases: Screen Mirroring ® at none against ClockKeepers's 1. Screen Mirroring ® also leads on iOS requirement (13.4 vs 15.0). ClockKeepers's advantage is ads (none vs shown) and update cadence (every 3 days vs every 2 weeks). On price 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

Both are free to download. ClockKeepers sells 1 one-off in-app purchase. Screen Mirroring ® asks for nothing beyond the download.

UpkeepUpdate frequency

Screen Mirroring ® ships an update every 2 weeks, ClockKeepers every 3 days. The most recent releases landed on October 11, 2026 and October 8, 2026 respectively.

Scorecard4 real differences · 6 level
Screen Mirroring ® versus ClockKeepers: the parameters behind the verdict, then further details
ParameterScreen Mirroring ®ClockKeepers
PriceFreeFree
Rating3.9 (2.6K ratings) — better—
Positive reviews33.6% of reviews—
Number of ratings2.6K — better—
Update frequencyEvery 2 weeksEvery 3 days — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.4 — better15.0
Further details — not scored
Size68 MB8 MB
Age rating4+4+
DeveloperZap Software Studio BVJoseph Ting

Bugs and requests

Screen Mirroring ®

Reported bugs

3 issues
  • App crashes or freezes
  • Unable to find or connect to TV
  • Mirroring stops working after a few minutes

Requested features

3 requests
  • Improve video quality and reduce latency
  • Add support for more TV brands and models
  • Provide better stability and reduce disconnections

ClockKeepers

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Screen Mirroring ®

No in-app purchases

1 purchases

ClockKeepers

One-time1
  • ClockKeepers Pro$7.99

Questions

Is Screen Mirroring ® free?
Screen Mirroring ® is free to download, with no in-app purchases.
Is ClockKeepers free?
ClockKeepers is free to download, with in-app purchases available.
Do Screen Mirroring ® or ClockKeepers have ads?
Screen Mirroring ® shows ads; ClockKeepers does not.
Which is updated more often, Screen Mirroring ® or ClockKeepers?
Screen Mirroring ® ships an update every 2 weeks, and ClockKeepers every 3 days. Most recently, Screen Mirroring ® was updated on October 11, 2026 and ClockKeepers on October 8, 2026.

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