# Sail Calculator vs EMail Tracker

The clearest difference is price: EMail Tracker at Free against Sail Calculator's $0.99. EMail Tracker also leads on iOS requirement (11.0 vs 13). Sail Calculator's advantage is update cadence (weekly vs every 2 months). On ads, in-app purchases and device support there is nothing between them.

EMail Tracker is free to download; Sail Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sail Calculator ships an update weekly, EMail Tracker every 2 months. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Sail Calculator | EMail Tracker |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Paid | — |
| Size | 12 MB | 27 MB |
| Requires iOS | 13 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tobias Stephan](https://appshunter.io/developer/1067841760) | [VICTORIAN HANG GLIDING & PARAGLIDING ASSOCIATION INC](https://appshunter.io/developer/1594349509) |

## What reviewers say

### Sail Calculator

[App page](https://appshunter.io/ios/app/sail-calculator/id1477713078)

This navigation tool helps estimate travel time for trips, accounting for detours and course changes. It offers a faster alternative to manual calculations for planning voyages.

**Highlights:** Calculate trip duration, Account for detours, Adjust for course changes, Faster than manual calculation, Estimate travel time

**Features:** Vision Pro support

**In-app purchases:** none


### EMail Tracker

[App page](https://appshunter.io/ios/app/email-tracker/id1668551351)

**In-app purchases:** none


## Frequently asked questions

### Is Sail Calculator free?

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

### Is EMail Tracker free?

EMail Tracker is free to download, with no in-app purchases.

### Do Sail Calculator or EMail Tracker have ads?

Neither Sail Calculator nor EMail Tracker shows ads.

### Which is updated more often, Sail Calculator or EMail Tracker?

Sail Calculator ships an update weekly, and EMail Tracker every 2 months. Most recently, Sail Calculator was updated on October 8, 2026 and EMail Tracker on October 7, 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.*