ZSmart vs Chess Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ZSmart
Control and manage your ZKTeco smart home devices from a single app. Monitor security cameras, locks, and alarms, and automate lighting and plugs with voice commands via compatible smart assistants.
- Remote lock and unlock management
- Real-time security camera viewing
- See and speak to visitors via video doorbell
- Smart alarm system control
- Adjustable smart bulb brightness and color
- Automated smart plug scheduling
- Voice control with Amazon Echo/Google Nest
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ZKTeco's smart home security system is an all-in-one IoT solution for the end users. Benefited from this smart and powerful system, we could enjoy a seamless experience with various smart home devices in one mobile App -- ZSmart. More importantly, when paired with a compatible Amazon Echo or Google Nest device, you can enjoy full hands-free control with voice commands. With ZSmart App, you can manage and control all the products in one App: - Smart Door Lock: Unlock and manage the lock from anywhere - Security Camera: View surveillance videos in real time - Video Doorbell: See & speak to visitors from anywhere - Alarm System: Protect the house with smart alarm system - Smart Bulb: Change the brightness or color as need - Smart Plug: Turn on or off automatically at a specific schedule - Smart Light Switch: Switch on or off anytime, anywhere
Chess Clock
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A clock for games played across a board. Six time controls, not one. Sudden death. Fischer increment, added after your move. Bronstein delay, which gives back exactly what you used. Simple delay, which makes the clock wait before it counts. Multi-period for tournament schedules. Byo-yomi for go and shogi. Delay and increment are different rules, and you can pick either. Increment banks time when you move fast. Delay never adds anything — it postpones. Most clock apps ship one of them and call it the other. This one names both and lets you choose, with the same clarity in the app that a real tournament clock has. A low time warning you set. Three thresholds in seconds, and they are yours to change. Colour on the panel, a sound, and a vibration — because during a game you are looking at the board, not at the phone. Most clocks give you nothing until the flag falls. The clock counts real seconds. It measures elapsed time, not screen frames. A slow frame never eats your clock, and changing the phone's time or time zone does not move it. If a clock cannot count seconds it is not a clock. The screen never sleeps. Not while a game is running. And a tap with your whole hand counts once, the way you would hit a real clock — not only when exactly one finger lands. When the game ends, it tells you where the time went. Total used, moves, average, the longest think and which move it was, how long you spent under your own warning, and how much you earned back from increment. 24 presets, from bullet to a two-period tournament schedule. Different times per side for handicap games. Pause and arbiter time adjustment. No account. No purchase. Works in airplane mode.
Screenshots
Verdict
The clearest difference is iOS requirement: ZSmart at 14.0 against Chess Clock's 17.0. On price, ads, 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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | ZSmart | Chess Clock |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (118 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 118 — better | — |
| Update frequency | Every 8 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 202 MB | 4 MB |
| Age rating | 4+ | 12+ |
| Developer | ZKTeco Inc. | Jinwan Kim |
In-app purchases
ZSmart
No in-app purchases
Chess Clock
No in-app purchases









