Binary O'Clock vs Split Flap
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Binary O'Clock
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There are only 10 types of people in this world: those who understand binary and those who don't. Binary O'Clock is a glowing binary clock for your iPhone, iPad and Apple Watch. Six columns of LEDs show the time as hours, minutes and seconds, ticking away in ones and zeros. HOW TO READ IT Each column is one digit of the time: HH MM SS. Read each column from the bottom up. The LEDs are worth 1, 2, 4 and 8, so add up the ones that are lit to get the digit. For example, a column with the 2 and 4 LEDs lit shows 6. FEATURES • Full-screen 24-hour clock with hours, minutes and seconds • Widgets for the Home Screen, Lock Screen and StandBy • An Apple Watch app, and complications for your watch face • Keeps the screen on while the clock is showing • No ads, no accounts, no data collected BINARY O'CLOCK PRO Tap the clock to open Settings, and try any of it first: a live preview shows your clock before you buy. A one-time purchase unlocks, on Apple TV, Mac, iPad, iPhone and Apple Watch alike: • Themes: White, Aviation green, and Dust, with dark dots on sand • Round LEDs • Learning mode: shows what each LED is worth and the number in each column • 12-hour time • A speaking clock: touch and hold the clock to hear "14:32 and 20 seconds", then a beep exactly on the second No subscription. The classic blue clock stays free, widgets and complications included. Also on Apple TV and Mac. Perfect on the nightstand in StandBy, on your wrist, or as a daily brain teaser for anyone learning binary.
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: Binary O'Clock at none against Split Flap's 1. Split Flap's advantage is iOS requirement (17.0 vs 26.0). On price, update cadence, ads 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
Both are free to download. Split Flap sells 1 one-off in-app purchase. Binary O'Clock asks for nothing beyond the download.
Binary O'Clock ships an update every 3 weeks, Split Flap monthly. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.
| Parameter | Binary O'Clock | 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 3 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPad, Mac, Apple TV, Apple Watch — better | iPhone, iPad, Mac, Apple TV |
| Requires iOS | 26.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 8 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Backslashed | Hello Good Day LLC |
In-app purchases
Binary O'Clock
No in-app purchases
Split Flap
- SplitFlap Premium$1.99
Questions
Is Binary O'Clock free?
Is Split Flap free?
Do Binary O'Clock or Split Flap have ads?
Which is updated more often, Binary O'Clock or Split Flap?
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