Comparison

Game Clock Pro vs Underground

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Game Clock Pro

A professional and elegant game clock designed for competitive turn-based games like Chess, Go, and Shogi. Offers tournament-grade accuracy, multiple time systems, and customizable alerts with a premium design and ultra battery efficiency.

Highlights
  • Tournament-grade accuracy
  • Professional time systems (Fischer, Bronstein, Byoyomi)
  • Premium customizable themes
  • Ultra battery efficient design
  • Customizable alerts (beep, voice, silent)
  • Save custom time control presets
  • Haptic feedback
Features
Read full description

The most elegant and professional game clock for serious board game players. Trusted by tournament players worldwide for Chess, Go (Baduk/Weiqi), Shogi, and all competitive turn-based games. WHY GAME CLOCK PRO? - Tournament-Grade Accuracy: Precision timing trusted by competitive players - Professional Time Systems: Fischer, Bronstein, Byoyomi, Canadian Byoyomi, Tournament modes - Premium Design: 6 stunning themes including Wood, Cherry Blossom, Ocean, High Contrast - Ultra Battery Efficient: Optimized refresh rates for hours of uninterrupted play - Customizable Alerts: Beep, countdown voice, or silent mode for any environment PERFECT FOR: - Chess (Blitz, Rapid, Classical) - Go/Baduk/Weiqi (with Byoyomi support) - Shogi (Japanese Chess) - Scrabble & Word Games - Backgammon, Checkers, Othello - Any competitive board game ADVANCED FEATURES: - Save custom presets for your favorite time controls - Haptic feedback for tactile confirmation - Large, easy-to-read display even in poor lighting - Elegant themes: Wood, Cherry Blossom, Ocean, High Contrast, Light, Dark - Clean interface that stays out of your way Join thousands of players who've upgraded their game experience. Download Game Clock Pro today and focus on your strategy, not the clock.

About

Underground

Manage a post-apocalyptic underground bunker, balancing resources, people's needs, and external threats. Build rooms, accept survivors, and guide your community's development through strategic decisions and mini-games.

Highlights
  • Build and manage over 40 types of rooms
  • Balance essential resources like food, water, and energy
  • Manage individual survivor skills, health, and stress
  • Accept or reject new survivors at your gates
  • Explore tunnels, gather loot, and trade with friends
  • Engage in mini-games for resources and event outcomes
  • Play offline with time pausing when the app is closed
Features
Read full description

The world has fallen. You are the last hope for those knocking at your gates. Underground is a deep bunker-management sim where every decision echoes through your food, water, power — and your people's spirits. Build compartments across three floors, take in survivors at the airlock, keep your resources in balance, and don't let the bunker go dark. What's waiting for you: • A living bunker — 40+ compartment types: generator room, farm, med bay, laboratory, armory, district map, the old metro and more. Every room works differently and demands your attention. • Resources with consequences — power, water, food, air, parts, fuel. Run out of water and newcomers will walk right past your gates. Overheat the generator and an accident is only a matter of time. • People, not numbers — every resident has skills, health, stress and relationships. Quarrels, illness, theft, panic — incidents won't wait: you have limited time to solve a problem before it gets worse. • Arrivals at the gate — survivors keep coming to the airlock. Let them in, turn them away, or send them off with rations? Your bunker's reputation decides who shows up tomorrow. • Your own path — fortress, radio contact, autonomy, science, evacuation or a return to the surface. Goals will show you where to grow next. • The metro and recon — explore the tunnels, gather loot, trade with friends and fight off threats in the corridors. • Mini-games that matter — harvest crops, repair equipment, calm a panic: quick games earn resources and change how events end. • Friends in the game — add friends, meet their survivors at your gates, exchange resources and earn bonuses for playing together. • Play at your own pace — minimize the app and time in the bunker stops. Come back and pick up right where you left off. Who this game is for: If you love Fallout Shelter, This War of Mine, or management games with personality — this one is full of "what if I try it this way?" moments. Not a five-minute arcade, but a bunker that grows with you. Download. Open the airlock. Decide who gets in first.

Screenshots

Game Clock Pro4 screens
Underground4 screens

Verdict

The call

The clearest difference is in-app purchases: Game Clock Pro at none against Underground's 5. Game Clock Pro also leads on ads (none vs shown) and review sentiment (100% vs 66%). Underground's advantage is update cadence (every 2 days vs every 3 months) and chart position (#107 vs unranked). On monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Game Clock Pro costs $2.99 and Underground $0.49 up front. Underground sells 5 one-off in-app purchases. Game Clock Pro asks for nothing beyond the download.

UpkeepUpdate frequency

Game Clock Pro ships an update every 3 months, Underground every 2 days. The most recent releases landed on September 24, 2026 and September 29, 2026 respectively.

Scorecard7 real differences · 4 level
Game Clock Pro versus Underground: the parameters behind the verdict, then further details
ParameterGame Clock ProUnderground
Price$2.99$0.49 — better
Rating—5.0 (6 ratings) — better
Positive reviews100.0% of reviews — better65.7% of reviews
Number of ratings—6 — better
Update frequencyEvery 3 monthsEvery 2 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidPaid
Best chart rank—#107 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.6
Further details — not scored
Size3 MB35 MB
Age rating4+9+
DeveloperEngin YazilanSunspear Software LLC

Customer experience

Game Clock Pro

Written reviews8 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Underground

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews35 reviews
Positive65.7%
Neutral5.7%
Negative28.6%

In-app purchases

None

Game Clock Pro

No in-app purchases

5 purchases

Underground

One-time5
  • Parts Crate (Small)$0.99
  • Parts Crate (Medium)$1.99
  • Supply Crate (Mixed)$1.99
Show 2 more
  • Support the Shelter$2.99
  • Parts Crate (Large)$3.99

Questions

Is Game Clock Pro free?
Game Clock Pro costs $2.99, with no in-app purchases.
Is Underground free?
Underground costs $0.49, and also offers in-app purchases.
Do Game Clock Pro or Underground have ads?
Underground shows ads; Game Clock Pro does not.
Which is updated more often, Game Clock Pro or Underground?
Game Clock Pro ships an update every 3 months, and Underground every 2 days. Most recently, Game Clock Pro was updated on September 24, 2026 and Underground on September 29, 2026.

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