# InterCalc

> Performs linear interpolation for data points to calculate unknown values. (iPhone/iPad app by River Rock Logic.)

- Source: https://appshunter.io/ios/app/intercalc/id498391316 (this page in markdown: same URL + `.md`)
- Developer: [River Rock Logic](https://appshunter.io/developer/340225113)
- Category: Utilities, Productivity
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 18.6 · 1 MB
- Languages: American English
- Released: 2012-02-03
- Data updated: 2026-06-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/intercalc/id498391316/reviews.md

## What is InterCalc?

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.

## Key features

- 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


## Frequently asked questions about InterCalc

### What is InterCalc used for?

InterCalc is used to linearly interpolate values based on a set of X-Y data points. This can be applied to tasks like calculating fluid volume from pressure readings or performing simple unit conversions.

### Is InterCalc free to use?

Yes, InterCalc is available for free. It does not have any associated costs for download or usage.

### What devices does InterCalc support?

InterCalc is available on iPhone and iPad devices.

### How often is InterCalc updated?

The latest version of InterCalc is 2.2.1, last updated on January 8, 2026. This indicates a history of updates, suggesting ongoing development and support.

### What is the age rating for InterCalc?

InterCalc has an age rating of 4+, making it suitable for a wide range of users.

### Does InterCalc have ads?

No, InterCalc does not contain advertisements. Users can enjoy an ad-free experience.

### Can InterCalc handle complex functions?

InterCalc can define arbitrary functions from a set of X-Y points, allowing it to handle relationships beyond simple linear ones.

### What kind of data can be used with InterCalc?

You can input custom X-Y values to define relationships, such as pressure and volume readings for tank calibration or pairs for unit conversions like Fahrenheit and Celsius.

## Version history (last 5 releases)

### 2.2.1 — 2026-01-08

updated age ratings

### 2.2.0 — 2022-09-12

- updated the user interface

### 2.1.0 — 2020-04-27

- handle dark mode better
- remove deprecated calls

### 2.0.4 — 2020-04-01

- add Launch storyboard

### 2.0.3 — 2018-11-02

- recompile so that app fills screen correctly on larger iPhones

## Apps similar to InterCalc

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [thoschCalc - calculator](https://appshunter.io/ios/app/thoschcalc-calculator/id1441230517) | — | $2.99 | Utilities |
| [BetonMix (concrete calculator)](https://appshunter.io/ios/app/betonmix-concrete-calculator/id872695788) | 2.0 (1) | Free | Utilities |
| [XL Random: Choice Helper](https://appshunter.io/ios/app/xl-random-choice-helper/id1447036517) | 5.0 (2) | Free | Utilities |
| [Max Random](https://appshunter.io/ios/app/max-random/id737452925) | 5.0 (1) | Free | Utilities |
| [Interpolator](https://appshunter.io/ios/app/interpolator/id635235982) | 4.9 (65) | Free | Utilities |
| [Interpolant](https://appshunter.io/ios/app/interpolant/id1448060045) | — | Free | Utilities |

## More apps by River Rock Logic

- [Sync Photo - SmugMug](https://appshunter.io/ios/app/sync-photo-smugmug/id340225110)
- [Tone Dial](https://appshunter.io/ios/app/tone-dial/id492704073)
- [LinkControl](https://appshunter.io/ios/app/linkcontrol/id781651785)
- [StartStopTimer](https://appshunter.io/ios/app/startstoptimer/id1526390431)
- [DateTimeWidget](https://appshunter.io/ios/app/datetimewidget/id1600579684)

All apps by River Rock Logic: https://appshunter.io/developer/340225113

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*