TodoKnock vs VisibleHour
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
TodoKnock
Read full descriptionHide full description
β What is TodoKnock? A count-focused progress tracker that visualizes "How many left?" for any goal. Set your target number, then tap each time you complete one. You'll always know exactly how close you are to finishing. β Perfect For - Reading 100 pages of a textbook - Watching 30 tutorial videos - Memorizing 50 vocabulary words daily - Doing 30 push-ups - Drawing 20 practice sketches If it has a number, you can track it. β Features That Keep You Going γProgress Gaugeγ Each tap updates your progress, showing your completion rate as a clear percentage. Celebrate with special effects when you hit 100%. γLevels & XPγ Earn experience points with every entry. Level up and stay motivated to keep going. γDaily Reportγ Open the app the next day to see a summary of yesterday's achievements. γStats & Historyγ View your total level and completed tasks. See your cumulative effort at a glance. γCloud Syncγ Create an account to safely store your data. Transfer easily when switching devices. β Pricing Core features are free. An ad-free option (one-time purchase) is also available. Start visualizing "How many left?" and achieve your goals today!
VisibleHour
Read full descriptionHide full description
An always-visible view of time on your phone, your wrist, and your spatial workspace. The day, drained as it passes. Your session, draining as you work. A quiet tap on your wrist when you've been at something too long. For when 30 minutes feels like 5. VisibleHour is a single-purpose external time sense β designed for people whose internal clock isn't always reliable. For time blindness. For hyperfocus. For the moments when "just five more minutes" becomes an hour. The dial isn't a clock face you check. It's a clock face you live alongside, on every surface you already glance at. Three rhythms, on every screen. The day. Your waking hours rendered as a draining amber arc β from the moment you start your day until you wind it down. Tells you how much day is in front of you, not just what time it is right now. The session. A focused block β 15, 25/5 Pomodoro, 30, 60, or 90 minutes. The pie at the center drains as time passes β a visual timer at session scale. Tap it to zoom into a visual timer face with minute marks. Pomodoro mode shows two amber tones β work, then a softer break. The body. A quiet tap on the wrist at the interval you set β 60, 90, or 120 minutes. No banner. No streak. No "you've been at this for two hours" guilt. Just a tap that says: notice the time. Optional desk mode β keep your phone or iPad awake during a session so the dial stays visible while you work. Cross-device sync. Start a session on your Vision Pro while working in spatial. Within a second, the Live Activity appears on your iPhone Lock Screen and the dial fills on your Apple Watch. Stop on the Watch β every screen clears together. Powered by iCloud private database, with no telemetry leaving your device. Calendar-aware. Optionally show your day's events on the dial β a quiet ink line for each meeting, sitting alongside your session. Tap the dial to surface the next event's title. Widgets everywhere. Lock Screen and Home Screen widgets on iPhone. Native complications on Apple Watch in four families. A spatial widget on Apple Vision Pro that coexists with your email, your MacBook display, and whatever else is in your spatial workspace. What it isn't. This is not a habit tracker. Not a productivity hammer. Not a notification machine. There are no streaks, no leaderboards, no "you used the app 12 days in a row" celebrations. There's no analytics, no third-party SDKs, no ads. The whole product is one quiet answer to a quiet question β how much time has passed? Privacy. No tracking. No analytics. No third-party services. The only data that ever leaves your device is the small piece of state that syncs through your private iCloud (active session, day boundaries, awareness interval, appearance preference). Calendar events are read locally on each device β they never sync to the cloud. Made quietly by sthreelabs.
Screenshots
Verdict
The clearest difference is price: TodoKnock at Free against VisibleHour's $4.99. TodoKnock also leads on update cadence (every 6 days vs every 3 months) and iOS requirement (16.6 vs 18.0). VisibleHour's advantage is in-app purchases (none vs 1) and device support (4 vs 2). On ads there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
TodoKnock is free to download; VisibleHour costs $4.99 up front. TodoKnock sells 1 one-off in-app purchase. VisibleHour asks for nothing beyond the download.
TodoKnock ships an update every 6 days, VisibleHour every 3 months. Both last shipped on October 28, 2026.
| Parameter | TodoKnock | VisibleHour |
|---|---|---|
| Price | Free β better | $4.99 |
| Update frequency | Every 6 days β better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch, Vision Pro β better |
| Requires iOS | 16.6 β better | 18.0 |
| Further details β not scored | ||
| Size | 56 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuichi Sasaki | sthreelabs LLC |
In-app purchases
TodoKnock
- Remove Ads$1.99
VisibleHour
No in-app purchases









