Comparison

InterCalc vs Tied2Shore

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

Head to head
About

InterCalc

This app performs linear interpolation using a set of X-Y values to define a relationship. It can calculate values based on defined points, useful for tasks like converting pressure readings to fluid volumes in containers or performing simple unit conversions.

Highlights
  • Linear interpolation of X-Y values
  • Defines arbitrary functions from data points
  • Calculates fluid volume from pressure readings
  • Performs unit conversions (e.g., temperature, speed)
  • Supports custom data sets
Features
Read full description

This application is designed to linearly interpolate a value given a set of X-Y values that define a relationship. The X-Y values can be as simple as two points that specify a simple line, or they can be a set of points that specifies an arbitrary function. One use of this program is to calculate the amount of fluid in a container given a pressure reading at the bottom of the tank. Typically this situation results in several pressure readings and corresponding volume ( gallons, liters ) readings as the tank is being filled. Once the pressure measuring device is so calibrated, pressure readings can then be converted to gallon or liter values. Other uses include simple conversions between Fahrenheit and Celsius, or between kph and mph.

About

Tied2Shore

This app provides seafarers with essential resources and support, whether at sea or in port. It offers an offline database of seafarer centers worldwide and an interactive global map for easy access to facilities.

Highlights
  • Offline seafarer center database
  • Interactive global map of centers
  • Offline library of seafarer resources
  • Resources tailored for maritime journeys
  • Spiritual encouragement and practical tools
Features
Read full description

Tied2Shore is an app created specifically for seafarers, in partnership with Port Ministries International. Whether you're at sea or in port, Tied2Shore helps you stay connected and supported with essential resources tailored to your journey. - Access a fully offline database of seafarer centers worldwide—automatically updated whenever you're online. - View an interactive global map of seafarer centers, available when connected to the internet. - Browse a growing library of offline resources, including books written specifically for seafarers by authors like Martin Otto. Tied2Shore is built with the unique needs of seafarers in mind—offering practical tools, spiritual encouragement, and global support, even when you're far from shore.

Screenshots

InterCalc4 screens
Tied2Shore4 screens

Verdict

The call

The clearest difference is update cadence: Tied2Shore at every 8 days against InterCalc's every 11 months. Tied2Shore also leads on ratings volume (4 vs 1) and iOS requirement (15.0 vs 18.6). On price, rating, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for InterCalc against 5.0 for Tied2Shore. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

UpkeepUpdate frequency

InterCalc ships an update every 11 months, Tied2Shore every 8 days. Both last shipped on October 1, 2026.

Scorecard3 real differences · 7 level
InterCalc versus Tied2Shore: the parameters behind the verdict, then further details
ParameterInterCalcTied2Shore
PriceFreeFree
Rating5.0 (1 ratings)5.0 (4 ratings)
Positive reviews—100.0% of reviews
Number of ratings14 — better
Update frequencyEvery 11 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.615.0 — better
Further details — not scored
Size1 MB80 MB
Age rating4+12+
DeveloperRiver Rock LogicGlobal Maritime Ministries

Customer experience

InterCalc

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Tied2Shore

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

InterCalc

No in-app purchases

None

Tied2Shore

No in-app purchases

Questions

Is InterCalc free?
InterCalc is free to download, with no in-app purchases.
Is Tied2Shore free?
Tied2Shore is free to download, with no in-app purchases.
Which has better reviews, InterCalc or Tied2Shore?
InterCalc and Tied2Shore are both rated 5.0 out of 5 on the App Store, from 1 and 4 ratings respectively.
Do InterCalc or Tied2Shore have ads?
Neither InterCalc nor Tied2Shore shows ads.
Which is updated more often, InterCalc or Tied2Shore?
InterCalc ships an update every 11 months, and Tied2Shore every 8 days. Most recently, InterCalc was updated on October 1, 2026 and Tied2Shore on October 1, 2026.

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