Sail Calculator vs EMail Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sail Calculator
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.
- Calculate trip duration
- Account for detours
- Adjust for course changes
- Faster than manual calculation
- Estimate travel time
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The tool calculates just how long you need for a trip. Of course you can also use a calculator or even mental calculation. It's faster with this helper. In practice the wind can change and so can the course. With this tool you can quickly determine in between how long you still need. Since you often have to cross and can not choose the direct way, the extended way is to be indicated as a percentage deviation. So you can even consider the detour in the time calculation.
EMail Tracker
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This App is for sending position updates to tracking websites via EMail. For example when you've temporarily suspended your Iridium Go service, but would still like to log your location to your Predict Wind tracking page. It supports a number of formats and websites and allows for custom destinations and formats to be defined. Note: if you have an active Iridium Go service, then Predict Wind disables updates to your tracker via email. Note: on iOS you must install and configure the Apple EMail App with an account.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Sail Calculator | EMail Tracker |
|---|---|---|
| Price | $0.99 | Free — better |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Weekly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13 | 11.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Tobias Stephan | VICTORIAN HANG GLIDING & PARAGLIDING ASSOCIATION INC |
In-app purchases
Sail Calculator
No in-app purchases
EMail Tracker
No in-app purchases
Questions
Is Sail Calculator free?
Is EMail Tracker free?
Do Sail Calculator or EMail Tracker have ads?
Which is updated more often, Sail Calculator or EMail Tracker?
Other comparisons
