# Q400-Performance — Takeoff & Landing V-Speeds

> Takeoff & Landing V-Speeds (iPhone/iPad app by MacLaren's Studio.)

- Source: https://appshunter.io/ios/app/q400-performance/id6758963990 (this page in markdown: same URL + `.md`)
- Developer: [MacLaren's Studio](https://appshunter.io/developer/549588446)
- Category: Utilities, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.6 · 10 MB
- Languages: American English
- Released: 2026-06-19
- Data updated: 2026-07-05
- User reviews in markdown: https://appshunter.io/ios/app/q400-performance/id6758963990/reviews.md

## What is Q400?

Fast, accurate takeoff and landing performance for the DHC-8-402 (Q400) — built by pilots, for pilots.

Q400 Performance Calculator turns AFM tables into instant results on the flight deck. Enter your conditions and get V-speeds, weight limits, and runway-specific numbers in seconds — no paper charts, no guesswork.

KEY FEATURES
• Takeoff — V1/VR/V2, max weights and limit codes for dry, wet, tailwind, MEL and contaminated runway conditions
• Reduced (assumed-temperature) takeoff with torque selection
• Landing — Vref, Vtarget, Vmax, go-around speeds with wind and contamination corrections
• Cruise — LRC, ISC, HSC, MCR plus single-engine and holding performance
• Missed approach climb gradients
• De-icing / icing speed corrections applied automatically
• Built-in airport and runway database — elevation, length, slope, shift

Designed around a clean cockpit-style interface: high-contrast values, dark display, and a layout that reads at a glance under any lighting.

This app is a planning aid. Always cross-check results against the approved Aircraft Flight Manual and your operator's procedures. The pilot in command remains responsible for all performance decisions.

SUBSCRIPTION
Q400 Performance Calculator is available with a 7-day free trial, then $5/month or $30/year. Your subscription unlocks all calculators and runway data. Payment is charged to your Apple ID and auto-renews unless cancelled at least 24 hours before the end of the current period.

Terms of Use (EULA): https://starbuck-dev.github.io/Q400Performance/terms/
Privacy Policy: https://starbuck-dev.github.io/Q400Performance/privacy/

Privacy first — no account required, no personal data collected, no tracking.

Calculate with confidence. Download Q400 Performance Calculator today.

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Annual | $29.99 | per year |



## Version history (last 1 release)

### 1.2 — 2026-06-19

No release notes.

## More apps by MacLaren's Studio

- [TimeCalc++](https://appshunter.io/ios/app/timecalc-plus-plus/id925647681)
- [Simple LogBook](https://appshunter.io/ios/app/simple-logbook/id1273238413)
- [DayDot - Event Countdown](https://appshunter.io/ios/app/daydot-event-countdown/id6758927138)
- [Simple LogBook](https://appshunter.io/ios/app/simple-logbook/id6759546071)

All apps by MacLaren's Studio: https://appshunter.io/developer/549588446

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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 2026-07-05.*