Sailing Reference vs Tidelight
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Sailing Reference
This comprehensive nautical navigation guide offers offline access to essential sailing information, including how-to guides, calculators for tides and courses, and flashcards for COLREGs. It also features a race timer and knot-tying animations.
- Offline nautical reference guide
- Tidal stream and time calculators
- Course to steer estimation
- COLREGs/IRPCS flashcards
- Race timer and lap timer
- Nautical knot animations
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Sailing Reference is the comprehensive reference guide for all of your nautical navigation needs. Ideal for beginner and seasoned sailors, the app contains information crucial to passing the various RYA Yachtmaster shorebased navigation and practical courses. All content is fully available offline so is not reliant upon a data connection at all. There are handy calculators for quickly estimating a course to steer, interpolating tidal stream data, calculating times and heights of tide at secondary ports, and estimating VHF radio transmission ranges. The in-depth reference section includes dozens of illustrated and detailed how-to guides covering: β’ Plotting a Course to Steer β’ Calculating Leeway β’ Calculating Set and Drift β’ Compass Deviation and Magnetic Variation β’ Estimated Positions β’ Interpolating Tidal Streams β’ Calculating Depth to Anchor β’ Bridge Clearances β’ Secondary Port Calculations β’ Buoyage and Beacons β’ Safety and Distress β’ VHF Radio β’ Weather and Shipping Forecasts β’ and Many More! For those who need to brush up on their knowledge of the COLREGs / IRPCS, load up the flashcards for a quick quiz. Included with the app are a set of βRules of the Roadβ flashcards covering numerous collision scenarios. Additional flashcards covering vessel lights, day shapes, flags and sound signals are available to purchase in-app as a single add-on pack. For the racing community there's a handy race timer with a 5,4,1,0 countdown and lap timer. Also available are instructional animations illustrating how to tie a number of the most common nautical knots. Each knot is accompanied by a brief description outlining suitable applications. The Bowline Knot is included with the main application, with other knots available to purchase in-app as a bundled add-on.
Tidelight
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TideLight keeps you connected to the coast. Simply and beautifully. Check tide times and heights at a glance for thousands of beaches worldwide. The app presents accurate tidal data in a clean, easy-to-read format. No clutter, no ads; just the tide when you need it. You donβt need a Tide.lamp to use the app, but if you have one, it brings the data to life. The lamp rises and falls with the tide at your chosen beach, giving you a visual connection to the sea. Wherever you are. With the Tidelight app, you can: β’ View tide times and heights for over 5,500 global locations β’ Save your favourite beach for quick access β’ Set up and control your Tide.lamp via Bluetooth β’ Customise how the lamp displays tide changes β’ Schedule lighting times to match your daily routine β’ Switch between different beach locations easily Designed to reflect the calm ebb and flow of the coast, the Tidelight app is simple, intuitive, and built to complement the Tide lamp. It is a beautifully made, sustainable product designed in the UK. Whether you live by the sea or not, Tidelight helps you connect to the coast in a simple, beautiful way.
Screenshots
Verdict
The clearest difference is price: Tidelight at Free against Sailing Reference's $2.99. Tidelight also leads on in-app purchases (none vs 2). On update cadence, ads, device support and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Tidelight is free to download; Sailing Reference costs $2.99 up front. Sailing Reference sells 2 one-off in-app purchases. Tidelight asks for nothing beyond the download.
Sailing Reference ships an update every 3 months, Tidelight every 5 months. The most recent releases landed on October 10, 2026 and October 8, 2026 respectively.
| Parameter | Sailing Reference | Tidelight |
|---|---|---|
| Price | $2.99 | Free β better |
| Positive reviews | 75.0% of reviews | β |
| Update frequency | Every 3 months β better | Every 5 months |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Monetization | Paid | β |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 14.0 β better |
| Further details β not scored | ||
| Size | 16 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Oliver Shingler | TIDELIGHT LTD |
In-app purchases
Sailing Reference
- Flashcards$0.99
- Knots$0.99
Tidelight
No in-app purchases





