Dose Doubler

Merge. Chain. Level up.

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Dose Doubler is a calm, satisfying merge puzzle that's built around one twist nobody else has: you steer every chain. Tap an empty tile to drop your current pill. If it lands next to a matching pill, they auto-merge into the next tier. From there, you take over: pills glow, you swipe between them, and the one you swipe TOWARD is where the chain combines next. You're not at the mercy of a board tilt — every step is a decision. Climb the tier ladder ten levels deep, from a humble Tablet to the legendary Panacea. Set up satisfying chains, multiplied at ×1.2, ×1.5, and ×2. Watch out for contaminated tiles and biohazard pills — they'll wreck a careless run, but a well-placed sandwich merge clears them with a 1.5× score bonus. FEATURES • 5×5 board, one-handed play, runs that fit in a single coffee break • Tap-to-place + swipe-to-steer — original mechanic, not another 2048 reskin • Ten hand-illustrated tiers with custom particle bursts on the big merges • Daily Challenge — the same seeded run for every player, every day, with streak tracking • Easy / Normal / Hard difficulty • Game Center leaderboards (all-time + daily) and sixteen achievements • Cross-run stats: best score, top tier, longest chain, total merges, tier distribution • Sound and haptic feedback (toggleable) • No accounts, no internet required for core play, no spam notifications CALM BY DESIGN No timers. No energy gates. No five-pop-up tutorial. Drop in, play a run, drop out. For entertainment only. Not medical advice.

Ratings & Reviews

  • 5.0
    out of 5
    1 Ratings

Bug fixes.

Version 1.3.1

The developer, Harbor Health Solutions, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Harbor Health Solutions, LLC
Size
82.8 MB
Category
Puzzle
Compatibility
Requires iOS 16.0 or later.
  • iPhone
    Requires iOS 16.0 or later.
  • Mac
    Requires macOS 13.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
9+
In-App Purchases
Yes
  • Pet Vet Theme $0.99
  • Space Med Bay Theme $0.99
  • Candy Capsule Theme $0.99
  • Surgery Theme $0.99
  • Pediatrics Theme $0.99
  • Remove Ads $2.99
  • Learn More
Copyright
© Harbor Health Solutions, LLC
  • Developer Website
  • Privacy Policy

    • Supports

    • Game Center

      Discover new games and play with friends. This game also features leaderboards and achievements.

    More by Harbor Health Solutions, LLC