Comparison

Terra Map vs SeaBase

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Terra Map

Navigate the outdoors with detailed worldwide maps, offline access, and route sharing. Track your adventures, view elevation profiles, and stay connected with a community of explorers. Optimized for extended use and battery efficiency.

Highlights
  • Offline worldwide maps
  • Route and marker sharing
  • Elevation and speed profiles
  • Geo-referenced photos
  • Optimized battery usage
  • Live community sharing
Features
Read full description

Enjoy every adventure safely with the best technology for outdoor navigation. Developed with the help of experienced hikers and bikers, Terra Map can meet all your needs. ►► FEATURES: • Optimized for use on both iPhone and iPad • Incredibly accurate and easy-to-read worldwide maps • Maps download for offline usage • Weather forecasts for any point on the map (Terra Map PRO users only) • Live Sharing-Terra Map community • Satellite imagery • Icons and text customization for better map readability • Easy sharing for markers and routes in various formats • Geo-referenced photos • Optimized battery usage for up to 14 hours of continuous track recording • Ability to store an unlimited amount of data by activating PRO mode via inApp purchase • Elevation and speed profile ► MAPS Terra Map allows you to download maps of the entire world for free with contour lines, trails, shelters and everything you need for your next hike. Once downloaded, the maps can be used even without an internet connection. ► LOADING AND SHARING MARKERS AND ROUTES You can easily export and import tracks and markers created with Terra Map or with other third-party applications/navigators. Manage any route available on the internet or shared by a friend (GPX or KMZ formats). ► WEATHER FORECASTS Select any point on the map in the world and get the weather forecast for the next 7 days (only for Terra Map PRO users). ► ELEVATION AND SPEED Elevation profile and speed graphs will be available for each recorded track. ► OPTIMIZED BATTERY USAGE Designed to work for an entire day, Terra Map also includes a battery monitoring system that, in case of active recording, will automatically stop the track to prevent the device from running out of power. NOTE: The effective battery duration depends by the battery condition, by the temperature and the device usage. ► LIVE SHARING Enable Live Sharing to share your data with the Terra Map community and see all active users around you. You can chat with them and send (and receive) your markers/tracks without leaving the app. ► TYPE OF PURCHASES Subscription: Payment will be made through your account (Apple ID). The annual subscription will be automatically renewed unless cancelled at least 24 hours before the expiration date. The user can manage their subscription and turn off automatic renewal in the account Settings section after purchase. Unlimited: You can download and update maps forever. Terra Map is available in a free version with some limitations. Terms and conditions: https://www.terramap.app/terms-and-conditions Privacy Policy: https://www.terramap.app/privacy-policy

About

SeaBase

This offline-first sailing companion provides essential tools for life on the water. It includes an anchor alarm, nautical charts, GPS navigation, tide information, and a logbook, all functioning without a cellular signal. Enjoy a comprehensive suite of features with a single, one-time purchase.

Highlights
  • Offline nautical charts
  • Anchor alarm with drift detection
  • GPS navigation and route planning
  • Offline tide predictions
  • Harbor and anchorage finder
  • Auto-tracking logbook
  • Reference guides and emergency tools
Features
Read full description

Less apps. More sailing. Seabase is the offline-first sailing companion. Anchor alarm, offline nautical charts, GPS navigation, tides, and a logbook — every tool you need on the water, all working without a signal. No accounts. No ads. PAY ONCE Seabase is a paid app — a single one-time purchase, and it's yours forever. No subscription, nothing auto-renews, no in-app purchases, no ads. Every offline chart region offered is included with unlimited downloads. You pay once and get the whole app. ANCHOR ALARM Drop a virtual anchor and Seabase watches your position with phase-based drift detection — scope warnings, drift alerts, and critical alarms with sound and vibration. A sliding-window filter rides out GPS noise instead of waking you for it. Arm it after the fact with "Already Anchored" mode, pause and resume on the fly, and control the whole watch from your wrist. Replay any past anchor session on a scrubbable radar track. Built to wake you before your boat does. OFFLINE CHARTS Download nautical chart regions to your phone with OpenSeaMap seamarks built in. A global base layer keeps you covered when you sail past your downloaded zone. NOAA depth overlays for US waters when online. GPS NAVIGATION Long-press the chart to plan a route — built-in land detection flags legs that cross land. Live navigation gives you bearing, distance, ETA, cross-track error, and remaining distance with heading-up auto-rotation. Save routes and replay them. A dedicated GPS Navigator adds a radar HUD plus point-to-point go-to. APPLE WATCH Native watchOS companion — speed, heading, anchor radar, and a navigation arrow on your wrist. Arm, disarm, pause, and resume the anchor alarm from the watch. Start and stop trip recording remotely. Mirrors your iPhone's dark/light theme. TIDES 3,500+ tide stations worldwide, completely offline. NOAA-accurate harmonic prediction from a bundled database — no API call, no signal needed. A clear "now" hero card with a trend chart and high/low times. NEARBY PLACES An offline harbor and anchorage finder covering 25 cruising regions worldwide — marinas, fuel docks, pump-outs, ramps, and more — with a searchable list and an offline map view. Hand off any place straight to the GPS Navigator. LOGBOOK Auto-tracking trip recorder with idle detection, photos, notes, and a speed graph. Shareable trip cards with a route preview. CSV export. Sail Recap turns any recorded trip into a shareable highlight video. REFERENCE Knots with animations · COLREGS rules · NATO phonetic alphabet · Safety-equipment guide (US, EU, AU, UK) · VHF MAYDAY / PAN PAN / SÉCURITÉ guide · IALA buoyage. EMERGENCY Always-dark emergency screen so it works at night. Heave-to guide, quick-reference distress procedures, MOB tracker, and rescue contacts. PRIVACY Your trips, photos, and routes never leave your phone, and your GPS position is never sent anywhere. The only network calls are to map/chart tile hosts for first-time region downloads. No accounts, no analytics, no tracking. LICENSE Recreational use only. Not a substitute for professional navigation equipment, official charts, or sailing certifications. You are responsible for your safety on the water. Built by sailors. Yeoman Ventures LLC, California. www.seabase.app · gosailing@seabase.app

Screenshots

Terra Map4 screens
SeaBase4 screens

Verdict

The call

The clearest difference is in-app purchases: SeaBase at none against Terra Map's 2. SeaBase also leads on rating (5.0 vs 4.6) and update cadence (every 6 days vs every 3 weeks). Terra Map's advantage is ratings volume (541 vs 2) and iOS requirement (13.0 vs 16.6). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Terra Map sells 2 in-app purchases, starting at $3.99 per year. SeaBase asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SeaBase holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Terra Map has 541 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Terra Map ships an update every 3 weeks, SeaBase every 6 days. The most recent releases landed on October 26, 2026 and September 30, 2026 respectively.

Scorecard6 real differences · 4 level
Terra Map versus SeaBase: the parameters behind the verdict, then further details
ParameterTerra MapSeaBase
PriceFreeFree
Rating4.6 (541 ratings)5.0 (2 ratings) — better
Positive reviews73.8% of reviews—
Number of ratings541 — better2
Update frequencyEvery 3 weeksEvery 6 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS13.0 — better16.6
Further details — not scored
Size189 MB80 MB
Age rating4+4+
DeveloperGEC s.r.l.Yeoman Ventures LLC

Customer experience

Terra Map

All ratings540 ratings
Positive91.3%
Neutral4.1%
Negative4.6%
Written reviews84 reviews
Positive73.8%
Neutral7.1%
Negative19.0%

SeaBase

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Terra Map

Reported bugs

12 issues
  • Mileage tracking significantly inaccurate
  • Map tiles fail to download or download incompletely
  • Download counter goes backwards during tile downloads
  • Cannot restore previous purchases after updates
  • Saved routes and downloads deleted unexpectedly
Show 7 more
  • Satellite imagery slider not functioning
  • Track recording stops registering without notification
  • Maps display as plain white after download
  • App opens to 0000:0000 coordinates instead of last position
  • Login/email confirmation not received for pro accounts
  • Map accuracy issues with colorful map option
  • Slow map loading performance on some devices

Requested features

6 requests
  • Satellite imagery offline download capability
  • Improved route planning that considers existing trails
  • Ability to input geographic coordinates for navigation
  • Distance calculation that follows paths with multiple segments
  • Enhanced waypoint icon options
Show 1 more
  • More map layer choices

SeaBase

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Terra Map

Subscriptions1
  • Pro Version$3.991 Year
One-time1
  • Pro Version$19.99
None

SeaBase

No in-app purchases

Questions

Is Terra Map free?
Terra Map is free to download, with in-app purchases available.
Is SeaBase free?
SeaBase is free to download, with no in-app purchases.
Which has better reviews, Terra Map or SeaBase?
SeaBase is rated higher. Terra Map averages 4.6 out of 5 from 541 ratings, while SeaBase averages 5.0 from 2 ratings.
Do Terra Map or SeaBase have ads?
Neither Terra Map nor SeaBase shows ads.
Which is updated more often, Terra Map or SeaBase?
Terra Map ships an update every 3 weeks, and SeaBase every 6 days. Most recently, Terra Map was updated on October 26, 2026 and SeaBase on September 30, 2026.

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