PSIence - Tire pressure calc

For road, gravel, MTB & more

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

Get the right tire pressure for any bike, any discipline. Physics-based. Brand-neutral. Road, gravel, trail, enduro, and downhill — all in one app. PSIence takes the guesswork out of tire pressure. Whether you're prepping a gravel bike the night before a ride or adjusting at the trailhead, PSIence gives you accurate front and rear pressure recommendations in seconds — for any discipline, any setup. WHY PSIence? Most pressure calculators cover one or two disciplines, ignore luggage weight, or only work with a specific brand's tires. PSIence covers all five disciplines — road, gravel, trail MTB, enduro, and downhill — with a single brand-neutral tool built on real physics. HOW IT WORKS Enter your rider weight, bike weight, tire widths, surface type, and tire system. PSIence uses a physics-based algorithm derived from the 15% sidewall drop model to calculate the optimal contact patch for your load — then outputs separate front and rear pressures in both PSI and bar. FREE FEATURES • Road, gravel, trail MTB, enduro & downhill disciplines • Separate front and rear pressure recommendations • PSI and bar output • Surface type selection (smooth, hardpack, gravel, loose, mud) • Tubeless, tubed, and tubeless + insert support • Save up to 2 bike setups locally — no account needed PRO — ONE-TIME UNLOCK • Unlimited saved bike profiles • Pack & luggage weight input (the only calculator that accounts for bikepacking gear) • Rim inner width input for precise contact patch calculation • Casing type: lightweight, standard, reinforced (EXO+), DH • Hookless rim safety check with automatic pressure cap • Wet conditions adjustment • Formula trace — see every step of the calculation • Share your setup with your riding group WORKS OFFLINE Every calculation runs on-device. No internet connection required. Your setups are saved locally — no account, no subscription, no cloud sync required. PSIence. The science of PSI.

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

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    Accessibility

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    Information

    Seller
    • Martin Luknic
    Size
    • 36.3 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 17.6 or later.
    • iPhone
      Requires iOS 17.6 or later.
    • iPad
      Requires iPadOS 17.6 or later.
    • Mac
      Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.3 or later.
    Languages
    English and 2 more
    • English, German, Slovak
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 Martin Luknic
  • Developer Website
  • Privacy Policy

    • More by Martin Luknic

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