Having lag, crashes, untextured buildings, or loading problems?
Most issues are usually caused by insufficient operational memory (RAM), full cache, or corrupted update files.

Follow the guide below to get your port running smoothly again.

COMMON ISSUES & QUICK CAUSES

• Visual Lag / Low FPS:
  Often caused by full RAM, low-power mode, or background apps
  

• White / Textureless Buildings:
  Caused by corrupted game files (often following an update)
  

• Stuck Loading Screen:
  Caused by unstable internet, a pending game update, or corrupted data
  

• Black / White Screen on Startup:
  Device lacks sufficient RAM (minimum requirement: 3 GB RAM)
  

• Unsaved Progress (Progress Revert):
  Caused by sync failure or corrupted local files
  

• Random Crashes:
  Memory overflow (RAM/cache) or specific game errors
  
  

UNIVERSAL FIXES: STEP-BY-STEP

A. Free Up Device RAM & Cache

(Real-time memory affects startup and responsiveness; it is different from storage)

• 🤖 Android

  1. Close all active apps via the app switcher (not just the back button)

  2. Remove heavy home screen widgets and delete unused apps

  3. Restart your device to wipe temporary memory and background tasks
     

• 🍎 iOS

  1. Close open apps and restart your device

  2. Quick RAM Clear (Devices with Home Button)
     Hold Sleep/Wake until the power-off slider appears ➔ hold the Home button until the screen flashes back to the Home screen

  3. Quick RAM Clear (AssistiveTouch)
     Settings ➔ Accessibility ➔ Touch ➔ Enable AssistiveTouch ➔ Go to Settings ➔ General ➔ Shut Down ➔ Open AssistiveTouch and long-press the on-screen Home button

B. Redownload Game Files
(Fixes White Buildings, Freezes & Reverts)

⚠ IMPORTANT (Android users): Before uninstalling, ensure your game is linked to Google Play in the game Settings so you do not lose your profile.

• 🤖 Android (Reinstall)

  1. Uninstall Port City

  2. Restart your device

  3. Reinstall from Google Play and relaunch
     

• 🍎 iOS (Offload App — Safe from data loss)

  1. Open Settings ➔ General ➔ iPhone Storage

  2. Tap Port City ➔ select Offload App (this deletes game files without removing your account data)

  3. Tap Reinstall App and relaunch
     

C. In-Game Battery / FPS Settings

Check the in-game Battery Saver toggle:

• Green Mode: Optimized power saving, capped at 30 FPS

• Red / Performance Mode: Higher responsiveness and frame rate, capped at 60 FPS (uses more battery)
  

3. STILL STUCK? CONTACT SUPPORT

If troubleshooting does not fix the problem, please contact Port City Support HERE with:

1. Your Player ID: Found in in-game Settings or at the bottom-right corner of the loading screen

2. Device Details: Model and amount of RAM

3. Issue Summary: When it started, actions that trigger it, and any error message pop-ups (include screenshots where possible)