Comparison

SafeTug by Trelleborg vs SailTimer API™

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

Head to head
About

SafeTug by Trelleborg

Features
Read full description

Bringing large vessels into port is an important and complex process that requires the ship’s captain, tug skippers and port operators to precisely coordinate their efforts – working as a cohesive unit. Situational awareness is mission critical here. Port operators need high range and accuracy of navigational measurements, clear visibility and access to relevant information in real time. SafeTug® from Trelleborg provides all this and more to create a more effective pilotage experience. It increases operational visibility for all parties to make port approach, berthing and departure easier, safer and more efficient. SafeTug® is built upon the same strong foundation as SafePilot® and together with our other products they shape a Smart Port solution. General highlights: · Assist vessels into harbour with realtime tracking and prediction. · Fast overview of how your activities effects the assisted vessel. · Assist any vessel, even AIS only vessels. · Supports safe, warning and danger zones for offshore STS operations. · Supports speed zones around STS target vessel. · Intelligent Multilayer Chart Handling - Designed with a dedicated kernel with intelligent chart handling allowing multiple layers such as depths, buoys, symbols, etc. · Day/Dusk/Night Screen - Option to shift to dusk or night screen with muting of all colours. · Follow vessels - Ensures that the assisted vessel and your tug boat always are within the screen. · Replay and Recording - Replay function of previous operations. Note: The basic version is for internal GPS usage only. For external GPS or AIS device support the Pro Navigation module is required. Please see our web page for possibilities. Only Trelleborg's own range of external GPS receivers is supported in the SafeTug Pro version. Support for AD Navigation's GPS hardware is possible with the AD Navigation module.

About

SailTimer API™

This app bridges the gap between your SailTimer Wind Instrument and other navigation or performance apps. It also offers access to crowdsourced wind maps and marine weather animations through a subscription, enhancing your sailing experience with real-time wind data.

Highlights
  • Integrates with SailTimer Wind Instrument
  • Delivers wind data to partner apps
  • Crowdsourced wind maps
  • Marine weather animations
  • Supports chartplotter apps
  • Real-time wind data
Features
Read full description

This app allows you to use SailTimer products in other partner apps. First, if you have the wireless SailTimer Wind Instrument (www.SailTimerWind.com), this app can receive the transmissions and deliver them to other apps for viewing. Use this app with the the SailTimer™ chartplotter app, or with lots of other navigation, wind gauge or performance apps (https://wi-rb.com/apps/). But what if you want to see what the wind is doing up ahead, or around the next point? Then you need our crowdsourced wind maps and marine weather animations. You can get the low-cost subscription here, to view our marine weather animations in partner apps. We'll add a growing list of partner apps at https://SailTimer.boats App web page: https://wi-rb.com/api. If you have a question or feedback please email info@SailTimer.co - we’re here to help. If you are getting the app and like this wireless technology, please help out other sailors by letting them know with a quick rating on this version while you’re here.

Screenshots

SailTimer API™4 screens

Verdict

The call

The clearest difference is in-app purchases: SafeTug by Trelleborg at none against SailTimer API™'s 6. On price, update cadence, 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. SailTimer API™ sells 6 in-app purchases, starting at $2.99 per month. SafeTug by Trelleborg asks for nothing beyond the download.

UpkeepUpdate frequency

SafeTug by Trelleborg ships an update fortnightly, SailTimer API™ every 4 weeks. The most recent releases landed on October 9, 2026 and October 16, 2026 respectively.

Scorecard1 real difference · 9 level
SafeTug by Trelleborg versus SailTimer API™: the parameters behind the verdict, then further details
ParameterSafeTug by TrelleborgSailTimer API™
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—1 — better
Update frequencyFortnightly — betterEvery 4 weeks
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPadiPhone, iPad — better
Requires iOS17.016.6 — better
Further details — not scored
Size204 MB19 MB
Age rating4+4+
DeveloperTrelleborg Marine Systems Denmark A/SSailTimer Inc.

In-app purchases

None

SafeTug by Trelleborg

No in-app purchases

6 purchases

SailTimer API™

Subscriptions6
  • Crowdsourced Wind Maps - Monthly7 Days trial$2.991 Month
  • WNI Marine Weather - Monthly7 Days trial$2.991 Month
  • AI Forecasts - Monthly7 Days trial$2.991 Month
Show 3 more
  • Crowdsourced Wind Maps - Yearly7 Days trial$19.991 Year
  • WNI Marine Weather - Yearly7 Days trial$19.991 Year
  • AI Forecasts - Yearly7 Days trial$19.991 Year

Questions

Is SafeTug by Trelleborg free?
SafeTug by Trelleborg is free to download, with no in-app purchases.
Is SailTimer API™ free?
SailTimer API™ is free to download, with in-app purchases available.
Do SafeTug by Trelleborg or SailTimer API™ have ads?
Neither SafeTug by Trelleborg nor SailTimer API™ shows ads.
Which is updated more often, SafeTug by Trelleborg or SailTimer API™?
SafeTug by Trelleborg ships an update fortnightly, and SailTimer API™ every 4 weeks. Most recently, SafeTug by Trelleborg was updated on October 9, 2026 and SailTimer API™ on October 16, 2026.

Other comparisons