Depthly vs Marinate
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Depthly
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Know how deep the water is before you get there. Depthly turns your iPhone into a pocket depth chart for the sea. Aim the crosshair anywhere on the map, tap once, and read the depth of the seabed at that exact spot. No sonar hardware, no cables, and nothing to install on your boat. BUILT FOR PEOPLE ON THE WATER Whether you sail, fish, cruise, paddle or dive, the question is always the same: how deep is it here? Depthly answers it in one tap, using published bathymetric survey data that covers seas around the world, with especially detailed coverage of European waters. TAP TO SOUND Take a sounding anywhere on the chart. Every measurement is saved as a pin with the depth, the exact position in decimal or degrees and minutes, the nearest place name and the time it was taken. Build your own private chart of the places that matter to you: anchorages, fishing marks, shallow passages, dive sites. DEPTH CONTOURS ON ANY MAP Generate depth contour lines for the area on your screen, at the interval you choose, drawn over a marine chart, a satellite view or a standard map. See at a glance where the bottom shelves, where the deep channel runs and where it gets thin. SEABED PROFILES Pick two points and Depthly draws the cross section of the seabed between them, with the total distance, the deepest and shallowest points and the average depth. Perfect for checking a passage, planning a dive or understanding a fishing ground. WORKS COMPLETELY OFFLINE Download the chart and the depth data for a whole cruising area before you leave the marina. Out on the water, with no signal at all, soundings, contours and profiles keep working exactly as they do at home. Your charts do not need the internet once they are on your phone. RECORD YOUR TRACKS Record your route while you are underway. Depthly logs your position and fills in the depth beneath you along the whole track, even if you were offline at the time. Review the track later on the map, see the seabed profile under your route, and keep a log of every trip. TAKE YOUR DATA WITH YOU Export tracks and seabed profiles as GPX or CSV files that open in chartplotters, mapping tools and spreadsheets. Depths are written the way chartplotters expect, so your recorded data slots straight into the rest of your navigation setup. TRUSTED SOURCES Depth data comes from EMODnet Bathymetry and GEBCO, the leading public bathymetric surveys. Depthly is a planning and reference tool: always use official charts and your own judgement for navigation. FREE TO USE, PRO IF YOU WANT MORE The free version includes five depth soundings every day, all map styles and unlimited track recording. Depthly Pro unlocks unlimited soundings, depth contours, seabed profiles, offline areas, GPX and CSV export and iCloud track sync. Pro is available as a monthly or annual subscription, or as a single lifetime purchase. The annual plan starts with a seven day free trial. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period, and can be managed or cancelled in your App Store account settings at any time. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://blayasoft.com/privacy.html Drop a pin on the sea and know what is under it. Download Depthly and take your first sounding today.
Marinate
Navigate the seas with offline charts, depth shading, and an anchor alarm that ensures your safety. Access worldwide charts, vessel traffic, and essential marine references without an internet connection. This app provides crucial navigation tools for any boater.
- Offline worldwide charts
- Anchor alarm with safety radius
- Man overboard marker
- Plain language chart symbol explanations
- Global depth shading and seabed relief
- GPX import/export
- Offline marine reference library
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Marinate is the chartplotter that works when nothing else does, no signal, no marina wifi, thirty miles offshore. Download your cruising area before you slip the lines and the whole app keeps working: charts, routes, depth shading, reference tables. Nothing phones home mid-passage. No account, no sign-up. Open it and you are navigating. WORLDWIDE CHARTS, NOT CHART PACKS Every coast on earth is included. No region to buy, no chartbook to add, no upgrade when you cruise somewhere new: the Aegean this summer and the Caribbean next winter on the same subscription. • Seamarks, buoys, lights, depth contours and soundings as vectors, sharp at any zoom • A fraction of the storage image tiles need • Download by area or along a route corridor AN ANCHOR WATCH THAT ACTUALLY WAKES YOU Set your anchor and a safety radius, and Marinate watches your position in the background, with the screen off and the phone in your bunk. If the boat drifts outside the circle it raises a continuous siren, not a single polite notification. We spent the most time on this, because a dragging anchor at 3 a.m. is when an app either earns its place or does not. SAFETY, NOT UPSELL Man overboard is one tap: a marker, the frozen position, and range and bearing back to it. MOB and the anchor drag alarm are free forever. NEW TO CHART SYMBOLS? Tap any buoy, beacon or light and Marinate says what it is in plain language: which side to leave it, which side to pass, what Fl.G.4s means. DEPTH YOU CAN READ AT A GLANCE • Global depth shading and contours: the blue gradient showing the bottom rise long before a sounding does, worldwide and offline • Seabed relief shading for the shape of the ground beneath you • Optional NOAA overlay in US waters, high-resolution survey depth in European seas SATELLITE AND HYBRID Satellite imagery of the whole planet, plus 10-metre coastal imagery for reading an anchorage before you commit: the sandy patch, the weed, the reef edge. Hybrid mode lays roads and place names over it. ROUTES, TRACKS AND MARKERS • Distance, bearing and ETA at your speed • Record and replay tracks • Markers for anchorages, hazards, dive sites and fishing marks, with photos • GPX import and export to swap with any other chartplotter MARINAS AND WHAT IS ASHORE Search marinas and harbours by name or near you, details kept offline: berths, fuel, water, contact. Search around your anchorage too: fuel, chandlery, pharmacy, supermarket, bus stop, by walking distance. A REFERENCE THAT KNOWS THE SEA Collision regulations in plain language with diagrams, code flags A to Z, day shapes, night lights, sound signals, IALA buoyage, emergency card. All offline, in your language. WEATHER, TRAFFIC AND FISHING • Live rain radar, so you see a squall coming and reef before it arrives. Free, no account • Wind forecast, pressure isobars, tides and currents • Shipping lanes and restricted areas you can tap to see what is restricted and why • AIS traffic (with a free aisstream.io key) • SignalK connects the boat's instruments (depth, wind, speed) with a shallow-water alarm • Sea-surface temperature and plankton layers: fish hunt the fronts and plankton edges, so look where the colour changes FOUR LANGUAGES English, Hebrew, French and Spanish, including the reference tables and the collision rules, not just the buttons. FREE AND PREMIUM Free forever: charts, GPS, routes, tracks, markers, MOB, anchor alarm, rain radar and one offline area. Premium adds depth shading and contours, satellite and official chart overlays, wind and pressure, sea temperature and plankton, AIS, SignalK, unlimited offline downloads and the extended forecast. 14-day free trial, with special launch pricing, cancel any time. IMPORTANT Marinate is an aid to navigation, not a replacement for official charts, a proper lookout, or your own judgement. Carry the charts your flag state requires. Continued use of GPS in the background can decrease battery life. Terms of Use: https://getmarinate.com/terms.html
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Verdict
Depthly and Marinate are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Depthly sells 3 in-app purchases, starting at $3.99 per month and Marinate sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | Depthly | Marinate |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 23 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Ivan Blajic | Ofer Kamrat |
In-app purchases
Depthly
- Monthly Premium$3.991 Month
- Annual Premium7 Days trial$8.991 Year
- Lifetime Premium$24.99
Marinate
- Premium Monthly14 Days trial$1.991 Month
- Premium Annual14 Days trial$14.991 Year








