Get in touch
Email support@dosedoubler.com for any of:
- Bug reports — include your iPhone model and iOS version
- Feature requests
- Game Center / leaderboard issues
- Daily Challenge questions
- Anything else
Replies usually within 1–2 business days.
Frequently asked
My score didn't show up on the leaderboard.
Make sure you're signed into Game Center: iOS Settings → Game Center → sign in with your Apple ID. Scores are submitted automatically when a run ends. If you played a run while signed out, that score won't post retroactively.
I lost my Daily Challenge streak unfairly.
Streaks tick over at midnight UTC, not your local midnight — so a "yesterday" run finished after UTC midnight may count as today's run. If you genuinely played on consecutive UTC days and the streak still broke, email us and we'll investigate.
How do I clear contaminated tiles?
Any merge that happens orthogonally adjacent to a contaminated tile cleans it up. The "biohazard" pills (which can't merge themselves) are different — clear them with a sandwich merge: place two matching pills on opposite sides of the biohazard pill, and they'll merge through it for a 1.5× score bonus.
Why does the game feel harder than I remember?
Tap Settings → Difficulty. Each difficulty has different spawn weights, junk frequency, and blocker pacing. You may have switched modes or the default tuning may have changed in an update.
How do I remove ads?
Open Settings inside the app and tap Remove Ads ($2.99, one-time purchase). The banner on the main menu and the post-game interstitial will both stop appearing. Rewarded video ads stay available as an opt-in — they only play if you tap a rewarded power-up.
I bought Remove Ads (or a theme) on another device — how do I restore it?
Open Settings inside the app and tap Restore Purchases. As long as you're signed in with the same Apple ID, your purchases will sync back automatically.
What themes are available?
Two free themes (Night Shift and ER) and five paid themes ($0.99 each): Pediatric, OR / Surgery, Candy Capsule, Space Med Bay, and Pet Vet. Each paid theme reskins the board with custom backgrounds, decorations, and chrome. Open the Themes shop from the main menu.
Do you collect my data?
No personal data — no name, email, location, or account. We do collect anonymous usage analytics and crash logs to fix bugs and improve the game. Ads are served in non-personalized mode by default. See the privacy policy for the full breakdown.