# performify vs V Speed Calculator

The clearest difference is price: performify at Free against V Speed Calculator's $0.99. performify also leads on update cadence (every 2 months vs every 14 months). V Speed Calculator's advantage is in-app purchases (none vs 1) and iOS requirement (13.5 vs 17.0). On ads and device support there is nothing between them.

performify is free to download; V Speed Calculator costs $0.99 up front. performify sells 1 in-app purchase, starting at $2.99 per month. V Speed Calculator asks for nothing beyond the download.

performify ships an update every 2 months, V Speed Calculator every 14 months. The most recent releases landed on October 4, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | performify | V Speed Calculator |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/v-speed-calculator/id1527508437/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 14 months |
| Monetization | — | Paid |
| Size | 95 MB | 14 MB |
| Requires iOS | 17.0 | **13.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Pascal Burlet](https://appshunter.io/developer/1493425854) | [Gev Simon](https://appshunter.io/developer/1527508439) |

## What reviewers say

### performify

[App page](https://appshunter.io/ios/app/performify/id1493425855)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AviatorPro | $2.99 | per month |


### V Speed Calculator

[App page](https://appshunter.io/ios/app/v-speed-calculator/id1527508437)

This app calculates critical V-speeds for aircraft takeoffs and landings. It automatically retrieves airport altitude and temperature, requiring only the aircraft's weight for calculations.

**Highlights:** Calculates V1, Vr, V2, Vfto, Verc, Vref, N1 speeds, Automatic airport altitude retrieval, Automatic temperature retrieval, Input aircraft weight, Supports Hawker 800xp

**In-app purchases:** none


## Frequently asked questions

### Is performify free?

performify is free to download, with in-app purchases available.

### Is V Speed Calculator free?

V Speed Calculator costs $0.99, with no in-app purchases.

### Do performify or V Speed Calculator have ads?

Neither performify nor V Speed Calculator shows ads.

### Which is updated more often, performify or V Speed Calculator?

performify ships an update every 2 months, and V Speed Calculator every 14 months. Most recently, performify was updated on October 4, 2026 and V Speed Calculator on October 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*