Petri: Microbe Swarm: Support
Need help or found a bug? Email mmorrone@nunchuckdesigns.com. Please include your iPhone model, iOS version, the app version (shown at the bottom of the main menu) and what happened. I read every message and usually answer within a few days.
How to play
Send a swarm
Drag from one of your colonies and release on another colony. Drag through more of your colonies on the way to send from all of them at once. The send dial sets how much each colony sends: 25, 50, 75 or 100% of its cells.
Upgrade a colony
Press and hold one of your colonies. Upgrading costs cells now but makes the colony grow faster and hold more.
Win a battle
Capture every colony on the map. Rival microbes also fight each other, so sometimes the best move is to wait.
Runs and Levels
Start run is the roguelike mode: pick a strain, choose battles on a branching map and pick a mutation after each win. Levels has 15 hand-made levels, three per world.
Common questions
Is my progress saved?
Yes, automatically, on your device. A run in progress is saved after every battle, so you can close the app and continue later.
Can I move my progress to a new iPhone?
Progress is part of the app's data, so it moves with an iPhone backup or a direct transfer to a new iPhone. Deleting the app deletes the progress.
Does the game need an internet connection or an account?
No. Petri plays fully offline and has no accounts. Ads (free version) only load when you're online.
What is Biomass?
Biomass is earned from achievements and runs, and spent on permanent upgrades for your runs. It is never sold for real money.
Is any of my data collected?
We don't collect any. The free version shows non-personalized ads from Google AdMob; see the privacy policy.
Ads and Remove Ads
When do ads appear?
Only on the screen after a run ends, never during a battle, and not during your first few runs.
What is "Double Biomass"?
After a run you can choose to watch a short ad to double that run's Biomass, once an hour. It's always optional. With Remove Ads you get the double without watching an ad.
How do I remove ads?
Buy Remove Ads once in the app. It removes ads forever on every device signed in to the same Apple Account and is shared with Family Sharing.
I bought Remove Ads but still see ads
Open the app's settings and tap Restore Purchases, signed in with the Apple Account you bought it with. If that doesn't help, email me with the date of the purchase.
Refunds
Purchases are handled by Apple. Request a refund at reportaproblem.apple.com.