Sail Tonga Cruising Guide vs EMail Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sail Tonga Cruising Guide
Navigate the Tonga Archipelago with detailed charts, routes, and anchorage information. This guide offers local knowledge, cultural insights, and safety tips to enhance your cruising experience.
- Interactive drill-down charts
- Detailed routes and waypoints
- Anchorage descriptions
- High-quality photographs
- Safety tips and tricks
- Cultural information
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Designed to fill in the gaps between GPS charts and LOCAL KNOWLEDGE, this fully interactive guide to cruising the waters of the Tonga Archipelago provides drill-down charts, routes, waypoints, detailed descriptions of anchorages (with waypoints), magnificent photographs and potentially life-saving tips and tricks to keep you off the reefs. Added to that all the cultural information you need to cruise Tonga. "Cruise with Confidence" backed by the resources and local experience of Sail South Pacific.
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 Tonga Cruising Guide's $29.99. EMail Tracker also leads on device support (3 vs 1) and iOS requirement (11.0 vs 15.6). On update cadence, ads and in-app purchases 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 Tonga Cruising Guide costs $29.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Sail Tonga Cruising Guide ships an update every 3 months, EMail Tracker every 2 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.
| Parameter | Sail Tonga Cruising Guide | EMail Tracker |
|---|---|---|
| Price | $29.99 | Free — better |
| Rating | 4.8 (5 ratings) — better | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 207 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Sail South Pacific Ltd. | VICTORIAN HANG GLIDING & PARAGLIDING ASSOCIATION INC |
In-app purchases
Sail Tonga Cruising Guide
No in-app purchases
EMail Tracker
No in-app purchases
Questions
Is Sail Tonga Cruising Guide free?
Is EMail Tracker free?
Do Sail Tonga Cruising Guide or EMail Tracker have ads?
Which is updated more often, Sail Tonga Cruising Guide or EMail Tracker?
Other comparisons
