CALC 1 Programmable Calculator vs ThetaCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CALC 1 Programmable Calculator
Create custom calculators with AI-generated JavaScript functions for precise calculations and data visualization. Assign programs to keys and manage data efficiently. Offers multiple calculation modes and extensive documentation.
- AI-assisted JavaScript function creation
- Customizable function calculators
- Data visualization and plotting
- Programmable calculator keys
- List and data management
- Multiple calculation modes (algebraic, RPN)
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Customize your calculators for quick and accurate calculations with CALC 1 - the ultimate programmable calculator for your iPhone or iPad. * Harness the power of AI: Ask your favorite AI tool to create JavaScript functions for you * Effortlessly create Function Calculators: Simply copy the AI-generated function code to your clipboard and tap the add button in the "Function Calculators" list - CALC 1 will automatically create a new Function Calculator (Always test the Function Calculator to verify the function is as you intended) * Execute functions with ease: Key in the parameter values to run the function and get instant results * Perform breakeven analysis: Function Calculators can solve for any non-integer parameter * Visualize data effortlessly: Create plots as a function of any parameter by entering the min and max values * Assign programs to individual calculator keys for personalized functionality * Create custom calculators by copying and pasting keys from pre-built calculators * Automatically generate keys from entered expressions for effortless reuse * CALC 1 has over 100 built-in functions that you can use from your JavaScript code * Manage lists and data with the List Manager and Data Manager for quick and accurate importing * Choose between algebraic, chain, or RPN calculation modes with an automatic stack * Access the CALC 1 documentation site with over 100 pages of searchable content and video tutorials, easily accessible through help links (?) within the app Whether you're a student, professional, or simply someone who appreciates the power of customization and AI-assisted productivity, CALC 1 offers a consistent and efficient solution to a wide range of problems. Upgrade your calculation experience with CALC 1 today!
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.
Screenshots
Verdict
The clearest difference is price: ThetaCalc at Free against CALC 1 Programmable Calculator's $9.99. CALC 1 Programmable Calculator's advantage is rating (4.6 vs 4.3) and update cadence (every 5 weeks vs every 3 months). On review sentiment, ratings volume, ads and in-app purchases 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
ThetaCalc is free to download; CALC 1 Programmable Calculator costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
CALC 1 Programmable Calculator holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 9 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
CALC 1 Programmable Calculator ships an update every 5 weeks, ThetaCalc every 3 months. The most recent releases landed on September 9, 2026 and June 1, 2026 respectively.
| Parameter | CALC 1 Programmable Calculator | ThetaCalc |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 4.6 (9 ratings) — better | 4.3 (4 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 9 — better | 4 |
| Update frequency | Every 5 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.1 — better | 17.6 |
| Further details — not scored | ||
| Size | 8 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | CalcFxC, LLC | Felix Stehli |
Customer experience
CALC 1 Programmable Calculator
ThetaCalc
In-app purchases
CALC 1 Programmable Calculator
No in-app purchases
ThetaCalc
No in-app purchases
Questions
Is CALC 1 Programmable Calculator free?
Is ThetaCalc free?
Which has better reviews, CALC 1 Programmable Calculator or ThetaCalc?
Do CALC 1 Programmable Calculator or ThetaCalc have ads?
Which is updated more often, CALC 1 Programmable Calculator or ThetaCalc?
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