# InterCalc vs SkipAlarm

The clearest difference is in-app purchases: InterCalc at none against SkipAlarm's 2. InterCalc also leads on iOS requirement (18.6 vs 26.0). SkipAlarm's advantage is update cadence (every 2 days vs every 11 months). On price, ads and device support there is nothing between them.

Both are free to download. SkipAlarm sells 2 one-off in-app purchases. InterCalc asks for nothing beyond the download.

InterCalc ships an update every 11 months, SkipAlarm every 2 days. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | InterCalc | SkipAlarm |
| --- | --- | --- |
| 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 2 days** |
| Monetization | Free | — |
| Size | 1 MB | 18 MB |
| Requires iOS | **18.6** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [River Rock Logic](https://appshunter.io/developer/340225113) | [Karl Heinz Herbel](https://appshunter.io/developer/891641490) |

## 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


### SkipAlarm

[App page](https://appshunter.io/ios/app/skipalarm-smart-alarm-clock/id6825633703)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 14-day Trial | Free | one-time |
| SkipAlarm Pro | $3.99 | one-time |


## Frequently asked questions

### Is InterCalc free?

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

### Is SkipAlarm free?

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

### Do InterCalc or SkipAlarm have ads?

Neither InterCalc nor SkipAlarm shows ads.

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

InterCalc ships an update every 11 months, and SkipAlarm every 2 days. Most recently, InterCalc was updated on November 1, 2026 and SkipAlarm on November 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.*