Comparison

InterCalc vs thoschCalc

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

thoschCalc

Features
Read full description

thoschCalc is a quick and easy to use calculator that immediately calculates the result as you enter the term. In addition to the basic arithmetic operations, the constants can be used - pi, g, e, c(0), G, m(u), e(u) and functions - sqr(x), sqrt(x), pow(b;e) - sin(x), cos(X), tan(x), acos(x), asin(x), atan₂(a;b) - exp(x), ln(x), log(x), log₁₀(x), log₂(x) - abs(x), trunc(x), round(x), mod(a;b) - max(x1;...;xn), min(x1;..;xn) be integrated into the calculation steps. Numbers of different units of the same dimension are automatically converted into the set unit of the calculation result before the calculation: - Length: mm, cm, dm, m, km, inch, foot, yard, mi, nm - Area: mm², cm², dm², m², km², inch², foot², yard², mi², nm², ha - Volume: mm³, cm³, dm³, m³, km³, inch³, foot³, yard³, mi³, nm³, ml, l, oz, oz(us), gal, gal(us), bbl, bbl(us) - Weight: µg, mg, g, kg, t, lbs - Time and date: t, ms, s, min, h, day, week, year (28), year (29 = leap year), date, time - Temperature: Celsius, Fahrenheit, Kelvin - Speed: m/s, km/h, mph, fps, kn - Flow: cm³/s, cm³/min, cm³/h, cm³/day, cm³/year, l/s, l/min, l/h, l/day, l/year, m³/s, m³/min , m³/h, m³/day, m³/year, km³/s, km³/min, km³/h, km³/day, km³/year The entered term and the result can be transferred to other programs by long pressing and copying or pasting (copy & paste). The color of the background can be changed by shaking (iOS only) or via a dialog. The free version can be used 10 times with the full range of functions. From version 6.0 onwards, an annual subscription must be taken out (the further development does not only live on air and love and not every expansion is permanently free despite a previous one-off purchase) or only calculations without constants, functions or units are possible. In the free version, the last 5 previous calculations can be restored via a selection box or by swiping vertically on the input field. An in-app purchase can increase the number of previous calculations to 500. With a further in-app purchase, the history (optionally including the results) can be displayed in a separate table in which you can search for previous terms in order to use them for further calculations. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

InterCalc4 screens
thoschCalc4 screens

Verdict

The call

The clearest difference is price: InterCalc at Free against thoschCalc's $2.99. InterCalc also leads on in-app purchases (none vs 3). thoschCalc's advantage is update cadence (every 3 weeks vs every 11 months) and device support (4 vs 2). On ads 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

InterCalc is free to download; thoschCalc costs $2.99 up front. thoschCalc sells 3 in-app purchases, starting at $0.99 per year. InterCalc asks for nothing beyond the download.

UpkeepUpdate frequency

InterCalc ships an update every 11 months, thoschCalc every 3 weeks. The most recent releases landed on June 25, 2026 and September 8, 2026 respectively.

Scorecard5 real differences · 4 level
InterCalc versus thoschCalc: the parameters behind the verdict, then further details
ParameterInterCalcthoschCalc
PriceFree — better$2.99
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 11 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS18.612.3 — better
Further details — not scored
Size1 MB2 MB
Age rating4+4+
DeveloperRiver Rock LogicThorsten Schueler

In-app purchases

None

InterCalc

No in-app purchases

3 purchases

thoschCalc

Subscriptions1
  • constants, functions & units$0.991 Year
One-time2
  • Extended history$0.99
  • Browse history$0.99

Questions

Is InterCalc free?
InterCalc is free to download, with no in-app purchases.
Is thoschCalc free?
thoschCalc costs $2.99, and also offers in-app purchases.
Do InterCalc or thoschCalc have ads?
Neither InterCalc nor thoschCalc shows ads.
Which is updated more often, InterCalc or thoschCalc?
InterCalc ships an update every 11 months, and thoschCalc every 3 weeks. Most recently, InterCalc was updated on June 25, 2026 and thoschCalc on September 8, 2026.

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