Comparison

InterCalc vs SkipAlarm

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

SkipAlarm

Features
Read full description

Your alarm should know when you have the day off. SkipAlarm wakes you when you need it — and lets you sleep in when you don’t. Set your alarm, choose your region, and let public holidays and vacations take care of themselves. No more switching alarms off the night before a holiday and forgetting to turn them back on. WAKE UP FOR WORK. SLEEP IN ON DAYS OFF. • Skip public holidays automatically based on your country and region. • Add vacations and individual days off to pause your alarms. • Need to get up on a day off? Add an extra alarm day. • Choose a different region for each alarm — ideal if you live and work across borders. • See upcoming alarms and skipped days at a glance. • Use Siri and Shortcuts to skip tomorrow’s alarms or refresh your schedule. MADE FOR YOUR REGION Includes holiday calendars for Germany, Austria, Switzerland, the United Kingdom, and the United States. Choose your state, canton, or UK nation where available. US coverage includes federal holidays; regional and company-specific days off can be added manually. A PROPER ALARM Alarms ring even in Silent mode and with Focus enabled. Choose your weekdays and snooze duration to make mornings work for you. PRIVATE BY DESIGN No account. No tracking. Your alarm settings stay on your iPhone. TRY IT. MAKE IT YOURS. Try holiday and vacation skipping during the free trial. Unlock SkipAlarm Pro with a one-time purchase to keep skipping. No subscription. SkipAlarm schedules alarms ahead of time. Open the app regularly to keep them topped up, or set up a weekly “Refresh Alarms” automation in Shortcuts. Less alarm management. More well-earned sleep. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

InterCalc4 screens
SkipAlarm4 screens

Verdict

The call

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.

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

UpkeepUpdate frequency

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.

Scorecard3 real differences · 6 level
InterCalc versus SkipAlarm: the parameters behind the verdict, then further details
ParameterInterCalcSkipAlarm
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 11 monthsEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.6 — better26.0
Further details — not scored
Size1 MB18 MB
Age rating4+4+
DeveloperRiver Rock LogicKarl Heinz Herbel

In-app purchases

None

InterCalc

No in-app purchases

2 purchases

SkipAlarm

One-time2
  • 14-day TrialFree
  • SkipAlarm Pro$3.99

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.

Other comparisons