No revenue estimate for the App Store: Apple publishes no install counts, and its star-rating counts don't calibrate to sales the way Steam's written reviews do. Reviews and prices only.
The Game Clock App serves for controlling the time in board games such as Chess, Go, Shogi and similar two-player games. It controls the time taken by each player by counting down from a preset starting time. Once the main time reaches zero, one of 9 different overtime schemes kicks in. These include Bio Yomi, Canadian Overtime, Progressive Canadian Overtime, Chess (with optional Sudden Death in one of the Extended Time Periods and optional Delay Time), Fisher, Bronstein, Simple Delay, Hourglass, or Sudden Death. The clock includes (optionally) visual and/or audible alarm when nearing time zero. The time control settings may be specified individually for each player.
Game Clock (Chess, Go, Shogi) price history
Trends
Price over time on the United States storefront, quoted in USD — from our own daily price tracking. Other markets are listed under "Price by market" in the Prices tab; they are not on this axis, because one line cannot be two currencies.
Showing the last 90 days (the review-based charts: the last 4 monthly points). Full history and CSV export come with a free account.
Related
Not enough data to name similar games: no other game shares enough of this one's tags.