# InterCalc vs QuantumPass

The clearest difference is in-app purchases: InterCalc at none against QuantumPass's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. QuantumPass sells 3 one-off in-app purchases. InterCalc asks for nothing beyond the download.

InterCalc ships an update every 11 months, QuantumPass every 10 months. The most recent releases landed on October 1, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | InterCalc | QuantumPass |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/intercalc/id498391316/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 10 months** |
| Monetization | Free | — |
| Size | 1 MB | 3 MB |
| Requires iOS | 18.6 | **17.6** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [River Rock Logic](https://appshunter.io/developer/340225113) | [Valerie Otero](https://appshunter.io/developer/1848585337) |

## What reviewers say

### InterCalc

[App page](https://appshunter.io/ios/app/intercalc/id498391316)

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:** macOS Compatibility

**In-app purchases:** none


### QuantumPass

[App page](https://appshunter.io/ios/app/quantumpass/id6755789663)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small coffee | $1.99 | one-time |
| Medium coffee | $3.99 | one-time |
| Large coffee | $5.99 | one-time |


## Frequently asked questions

### Is InterCalc free?

InterCalc is free to download, with no in-app purchases.

### Is QuantumPass free?

QuantumPass is free to download, with in-app purchases available.

### Do InterCalc or QuantumPass have ads?

Neither InterCalc nor QuantumPass shows ads.

### Which is updated more often, InterCalc or QuantumPass?

InterCalc ships an update every 11 months, and QuantumPass every 10 months. Most recently, InterCalc was updated on October 1, 2026 and QuantumPass on October 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*