SClock vs Tack Time
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SClock
This app offers a customizable clock with adjustable display sizes and color options. It features dual timers with customizable sounds and visual cues, perfect for time management tasks like Pomodoro.
- Adjustable display size
- Color selectable clock face
- Dual timer functionality
- Customizable countdown sounds
- Color-coded time display
- Simple, easy-to-read design
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・ 24H / 12H calendar Simple clock function with color selectable ・The sound before the start, the countdown sound, the color display can be changed according to the remaining time, and the two timers can be switched, making it ideal for pomodoro timers, etc.The sound before the start, the countdown sound, the color display can be changed according to the remaining time, and the two timers can be switched, making it ideal for pomodoro timers, etc. ・By switching between large format and middle size display, it is easy to use at hand and has excellent visibility from a distance in a wide place. ・Simple and easy-to-read design. You can use it in any situation such as studying, meetings, presentations, sports, fitness, cooking, etc.
Tack Time
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This app has fully transitioned to a pure native iOS portrait aesthetics architecture. We have thoroughly and physically removed all redundant legacy components and outdated concepts from the underlying engineering. The current version introduces a brand new 100% independently original portrait visual fluid focus clock (Tack Time), with deeply optimized high-precision, high-fidelity haptic feedback, bringing you a pure, immersive time-focused experience free from any impurities. Make time visible and give every focus session a natural rhythm. Tack Time is a groundbreaking tool that merges ultimate visual aesthetics with scientific efficiency. [Ultimate Smoothness: Pure Flutter Engine] Powered by high-performance Flutter rendering, we deliver a zero-lag, native-smooth experience for Retina displays. Whether it's complex fluid physics or subtle light reflections, everything renders elegantly at high frame rates. [First-of-its-kind Liquid Clock: Waves & Swimming Fish] Our exclusive "Ocean Clock" materializes the passage of time as a surging tide inside the digits. As seconds tick, you'll see bright waves rise and fall, and colorful fish swim freely. Every glance is a healing visual feast to help you instantly enter the zone. [Multi-Dimensional Focus Data: Deeply Review Your Productivity] We go beyond simple check-ins to provide a multi-dimensional focus intelligence hub. Detailed analysis of completion rates and time distribution makes your progress visible. With secure iCloud sync, your efforts are seamlessly connected across devices. [Diverse Desk Aesthetics: Fun Math Formula Faces] We offer brain-stimulating math formula faces that decode time with clever equations, making every glance a moment of inspiration. With an automatic always-on screen design, it is the perfect companion for your workspace setup or nightstand. [Scientific Pomodoro Integration] Breathe with the built-in Pomodoro technique. Fully customize focus and break intervals to master your own rhythm of deep work and relaxation. Upgrade to Pro to permanently unlock all current and future premium faces and enjoy a completely ad-free flow space.
Screenshots
Verdict
The clearest difference is ads: Tack Time at none against SClock's shown. Tack Time also leads on iOS requirement (13.0 vs 16.1). On price, update cadence, in-app purchases 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. SClock sells 1 in-app purchase, starting at $0.99 per month and Tack Time sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
SClock ships an update fortnightly, Tack Time every 2 weeks. The most recent releases landed on October 6, 2026 and September 26, 2026 respectively.
| Parameter | SClock | Tack Time |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (24 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 24 — better | — |
| Update frequency | Fortnightly — better | Every 2 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Hajime Suzuki | 庆芬 黄 |
In-app purchases
SClock
- premium$0.991 Month
Tack Time
- Unlock Tack Time Pro$2.99









