# PSIence - Tire pressure calc — For road, gravel, MTB & more

> For road, gravel, MTB & more (iPhone/iPad app by Martin Luknic.)

- Source: https://appshunter.io/ios/app/psience-tire-pressure-calc/id6772916222 (this page in markdown: same URL + `.md`)
- Developer: [Martin Luknic](https://appshunter.io/developer/1872362623)
- Category: Health & Fitness, Sports
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.6 · 35 MB
- Languages: American English, German (Germany), Slovak
- Released: 2026-06-22
- Data updated: 2026-07-01
- User reviews in markdown: https://appshunter.io/ios/app/psience-tire-pressure-calc/id6772916222/reviews.md

## What is PSIence?

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.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| PSIence Pro | $4.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-06-23

No release notes.

## More apps by Martin Luknic

- [ActionCatch](https://appshunter.io/ios/app/actioncatch/id6758338671)
- [Kelvin Sous Vide](https://appshunter.io/ios/app/kelvin-sous-vide/id6764517692)

All apps by Martin Luknic: https://appshunter.io/developer/1872362623

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-01.*