ClockU vs Split Flap
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ClockU
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ClockU is a big, beautiful bedside alarm clock that your friends can set. Going on a trip and need everyone up for the 6am bus? Want your partner to make sure you don't sleep through the big day? With ClockU, the people you trust can add a wake-up to your clock, with a message that shows up large on your screen when it rings. And when you tap "I'm up", they get told. A REAL ALARM CLOCK • A large LED-style clock made for your nightstand, in landscape on iPhone and full screen on iPad • Alarms ring like the built-in Clock app: through silent mode and Focus, full screen, with snooze • Set your own alarms too: repeating on the days you choose, or once on a date, with a note that shows big when it rings • The ALARM light shows when something will ring, with the next time and message right on the clock • Pick the LED colour, and let it dim at night and brighten before your alarm • Widgets for StandBy and the Lock Screen show your next wake-up and who set it • Works with Siri: "Wake Dana with ClockU" FRIENDS SET THE WAKE-UP • Pick one friend or several, choose a time, write a message • Make it repeat: every weekday, or the days you choose, approved once • Change the time or message for everyone at once, or cancel it • Send a recent wake-up again with one tap • See who accepted, whose phone is set to ring, and who tapped "I'm up" • They can reply with one tap: "On my way", "5 more minutes" … • If someone doesn't get up, you'll hear about it YOU STAY IN CONTROL • Nobody can add a wake-up until you approve them • Letting someone wake you doesn't let you wake them: permissions go one way • Choose per person: ring automatically, or ask you to accept each wake-up • You choose how it rings: sound and snooze are yours • Report or block anyone at any time TRY IT ON YOUR OWN Add @clocku_demo under People: our demo friend approves you, sends you a test wake-up a few minutes later, and confirms when it's "up". Want another? Tap the … menu next to the demo friend and choose "Request another wake-up". ClockU doesn't track you or show ads. Your own alarms stay on your phone. Crash reports are sent only if you agree.
Split Flap
Transform your devices into a retro split-flap display. Enjoy various modes like clock, weather, messages, and timers with satisfying mechanical sounds. Customize your display with unique themes and patterns across all your Apple devices.
- Split-flap display simulation
- Multiple display modes (Clock, Weather, Message, Timer)
- Customizable themes and flip patterns
- Lock Screen and Home Screen widgets
- Cross-platform support (iPhone, iPad, Mac, Apple TV)
- Satisfying mechanical sound effects
- StandBy mode integration
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Turn any screen into a split-flap departure board. Split Flap brings the look and sound of a mechanical airport board to your iPhone, iPad, Mac and Apple TV — with one purchase and no subscription. MODES FOR EVERY MOMENT Clock — A flip clock with custom time zones, 12 or 24 hours and optional seconds. Focus Clock — A big, calm clock made for your desk or nightstand. World Clock — Up to eight cities at once, like a real departures board: LON, NYC, TYO and more. Weather — Today's conditions, high, low and chance of rain for any city, flipping onto the board. Message — Type anything and watch it flip into place letter by letter. Start from ready-made templates, add emoji, and share your board as an image. Quotes — Your favourite quotes, rotating automatically. Hide a quote or schedule it for certain hours and days. Syncs with iCloud. Music — The song and artist that's playing flips into view as your music changes. (iPhone, iPad and Mac) Timer — Countdown presets from 5 to 90 minutes, or a stopwatch. Big digits you can read across the room. Paint — 43 colour patterns, from flags to gradients, plus a pixel editor to paint your own. Put text over a pattern for a colourful sign. ON YOUR LOCK SCREEN AND HOME SCREEN A Lock Screen flip clock with seconds that keep ticking, a sweeping minute ring and quotes on real flap tiles. Home Screen widgets for the clock, quotes, messages, timer and colour patterns, and StandBy when your phone charges on its side. A running timer counts down live in the Dynamic Island and on the Lock Screen. EVERY SCREEN YOU OWN iPhone, iPad, Mac and Apple TV, each built for the device. Apple TV has a Top Shelf that plays the board right on your Home Screen. Mac has desktop widgets, a menu bar clock and a screen saver. iPhone Duo gets a Nightstand clock when half folded. LOOK AND FEEL 9 colour themes including Neon and Confetti, light and dark boards, and 10+ flip patterns — spiral, matrix, snake and more — that control how the board reveals new content. Bedtime auto-dim keeps it gentle at night. SOUNDS THAT SATISFY Three sound themes — Mechanical, Typewriter and Soft — synthesised to match the animation. Every clack lands at the moment each flap snaps into place. HANDS-FREE Siri and Shortcuts can show the clock, post a message, start a timer or switch modes. Send to Apple TV posts a message from your iPhone straight to the board on your TV. ONE PURCHASE. EVERY PLATFORM. One purchase unlocks premium on iPhone, iPad, Mac and Apple TV. No subscription. No ads.
Screenshots
Verdict
The clearest difference is in-app purchases: ClockU at none against Split Flap's 1. ClockU also leads on update cadence (every 2 days vs monthly). Split Flap's advantage is device support (4 vs 2) and iOS requirement (17.0 vs 26.0). On price and ads 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
Both are free to download. Split Flap sells 1 one-off in-app purchase. ClockU asks for nothing beyond the download.
ClockU ships an update every 2 days, Split Flap monthly. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.
| Parameter | ClockU | Split Flap |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.5 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 2 days — better | Monthly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad, Mac, Apple TV — better |
| Requires iOS | 26.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Ori Roniger | Hello Good Day LLC |
In-app purchases
ClockU
No in-app purchases
Split Flap
- SplitFlap Premium$1.99









