ThetaCalc vs Calculator for Complex Field
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ThetaCalc
This utility app provides a Reverse Polish Notation (RPN) calculator. Users can extend its functionality by programming custom functions and equations using JavaScript.
- Reverse Polish Notation (RPN) calculator
- User-programmable functions
- JavaScript equation support
- Extensible functionality
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ThetaCalc is a RPN (Reverse Polish Notation) calculator which can be extended by functions and equations programmed by the user in JavaScript.
Calculator for Complex Field
Input natural math expressions and get instant results on a separate line, allowing for easy revisions. Save up to 20 inputs and incorporate saved answers into new expressions. Supports complex field calculations with adjustable decimal digits and three output formats.
- Natural math expression input
- Automatic result display
- Input revision for updated results
- Save and reuse up to 20 inputs
- Incorporate saved answers into expressions
- Complex field calculations
- Adjustable decimal digits
- Three output formats (Fixed, Scientific, Engineering)
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Your input to this app will be a natural math expression, and the answer will appear in a separate line. This makes it easy to revise current input to get an updated result. Up to 20 of your inputs will be automatically saved and can be reused later. You can also save your answer and incorporate it into your input expressions later. Undo and redo buttons will help you edit your expressions. All mathematical operations are performed in the complex field. Output will be a real or a complex number depending on your input and the selection is automatic. Three output formats are available for you to select: Fixed point, scientific and engineering. The number of decimal digits is adjustable. Finally, the help and demo buttons will bring you quick and easy usage examples. Current version includes the following math functions: exp, log, log10, sin, cos, tan, sinh, cosh, tanh, asin, acos, atan, asinh, acosh, atanh, abs, angle, real, imag and power (^).
Screenshots
Verdict
The clearest difference is rating: Calculator for Complex Field at 5.0 against ThetaCalc's 4.3. Calculator for Complex Field also leads on update cadence (fortnightly vs every 3 months). On price, review sentiment, ratings volume and 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Calculator for Complex Field holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 4 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
ThetaCalc ships an update every 3 months, Calculator for Complex Field fortnightly. The most recent releases landed on October 1, 2026 and October 24, 2026 respectively.
| Parameter | ThetaCalc | Calculator for Complex Field |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (4 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 4 | 4 |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Felix Stehli | Jongseung Park |
Customer experience
ThetaCalc
Calculator for Complex Field
In-app purchases
ThetaCalc
No in-app purchases
Calculator for Complex Field
No in-app purchases
Questions
Is ThetaCalc free?
Is Calculator for Complex Field free?
Which has better reviews, ThetaCalc or Calculator for Complex Field?
Do ThetaCalc or Calculator for Complex Field have ads?
Which is updated more often, ThetaCalc or Calculator for Complex Field?
Other comparisons
