Chess Clock App vs Physical Chess Clock
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Use a physical clock if your game is FIDE-rated and played over the board - the rules do not let you keep a phone on you in the playing venue, so an app cannot be your clock. For everything else, club nights, casual games, training, blitz in a café, Go or Scrabble, an app or a browser clock does the same job for free.
That single rule decides most of it. The rest is a trade between convenience and tactile reliability, and the table below lays it out.
Can you use a phone as a chess clock in a tournament?
Not in a FIDE-rated over-the-board game. Article 11.3.2 of the FIDE Laws of Chess forbids a player from having a mobile phone or any device capable of suggesting moves on their person in the playing venue during the game. Competition rules may permit a phone that is completely switched off inside a bag, provided the arbiter is told before the round - a switched-off phone in a bag obviously cannot be the clock on your table.
A player found with a device on them can be forfeited, though the rules of a given competition may set a lesser penalty. In practice the organiser supplies or approves the clock, and that clock is a piece of hardware.
None of this applies to a club night, a training game, an online game or a casual game at home. There, a phone clock is what most players actually use.
App, browser or hardware, side by side
| Chess clock app | Browser clock | Physical clock | |
|---|---|---|---|
| Cost | Free | Free, nothing to install | €85 for a DGT 3000 |
| FIDE-rated game over the board | Not allowed | Not allowed | Required |
| Fischer, Bronstein, US delay | Yes | Yes | Yes |
| Multi-stage tournament controls | Yes | Yes | Yes |
| Setting a custom cadence | Seconds, on screen | Seconds, on screen | Button sequences from a manual |
| Power | Your device's battery | Your device's battery | AA batteries, months of play |
| Risk of interruption | A call can cover the clock unless the device is in a focus mode | Same, plus an accidental tab switch | None |
| Works with no network | Yes | Yes, once loaded | Yes |
| Extra thing to carry | None | None | A second object in your bag |
| Sound, themes, stats | Yes | Yes | Beeps |
Which physical chess clock should you buy?
The arbiter approves the equipment, so more than one clock qualifies, but the reference is the DGT 3000, sold as the FIDE Championship Clock and described by the manufacturer as approved by the International Chess Federation. It lists at €85 including VAT and handles Fischer, Bronstein-style delay, US delay, byo-yomi, Canadian byo-yomi and multi-stage tournament controls.
If you play rated over-the-board chess more than once or twice a year, that is the purchase to make, and no app replaces it. If you do not, the money is better left unspent.
Where an app genuinely beats a physical clock
Setting up an unusual cadence. On hardware this means a button sequence out of a manual; on a screen it is a keypad and a few seconds. The same goes for giving each player a different clock for a handicap game.
And availability. The best chess clock is the one that is on the table, and the phone in your pocket is always on the table. A DGT left at home has a value of zero.
Questions
Can I use my phone as a chess clock in a tournament?
Not in a FIDE-rated over-the-board game: Article 11.3.2 of the Laws of Chess forbids having a phone on your person in the playing venue during the game, and the organiser supplies or approves the clock. In club, casual and training games a phone clock is completely normal.
Is a physical chess clock more accurate than an app?
No. Both keep time far more precisely than a game requires. The advantage of hardware is the input and the absence of interruptions, not the timekeeping.
What does a good physical chess clock cost?
The DGT 3000, approved by FIDE, is listed at €85 including VAT on the manufacturer's shop. That buys Fischer, both delay styles, byo-yomi and multi-stage tournament controls.
Do I need a physical clock to play at my local club?
Usually not for casual play - most clubs already own clocks, and for training games a phone is fine. Check with the club if their internal competitions are federation-rated.
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