Apps by River Rock Logic
InterCalc app icon

Utilities

InterCalc

River Rock Logic

Free download 5.00 · 1 storefront · 1 rating In-app purchases unconfirmed
Open on Apple

About this app

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.

Latest release

What’s New

Version 2.2.1 Jan 8, 2026

updated age ratings

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +0
US rating-count history
1 ratings
1 Aug 13, 2026 · 1 ratings Aug 13, 2026

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking

Price intelligence

1 captured event
Current Free
Historical low Free
Paid → free
Price history
Current Free
Free Aug 13, 2026 · Free Aug 13, 2026

First snapshot captured. The trend line starts after the next crawler price observation.

  1. First observed Aug 13, 2026 · 4:06 AM Free

Screenshots

InterCalc iPhone screenshotInterCalc iPhone screenshotInterCalc iPhone screenshotInterCalc iPhone screenshot InterCalc iPad screenshotInterCalc iPad screenshotInterCalc iPad screenshot