# ThetaCalc vs Voltcraft VC

The clearest difference is iOS requirement: Voltcraft VC at 11.0 against ThetaCalc's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ThetaCalc ships an update every 3 months, Voltcraft VC every 2 months. The most recent releases landed on October 1, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | ThetaCalc | Voltcraft VC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (4 ratings)](https://appshunter.io/ios/app/thetacalc/id1521614636/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 1 MB | 13 MB |
| Requires iOS | 17.6 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Felix Stehli](https://appshunter.io/developer/1521614638) | [CEI Conrad Electronic International (HK) Limited](https://appshunter.io/developer/756357900) |

## What reviewers say

### ThetaCalc

[App page](https://appshunter.io/ios/app/thetacalc/id1521614636)

This utility app provides a Reverse Polish Notation (RPN) calculator. Users can extend its functionality by programming custom functions and equations using JavaScript.

**Highlights:** Reverse Polish Notation (RPN) calculator, User-programmable functions, JavaScript equation support, Extensible functionality

**Features:** macOS Compatibility

**In-app purchases:** none


### Voltcraft VC

[App page](https://appshunter.io/ios/app/voltcraft-vc-41/id6740763421)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ThetaCalc free?

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

### Is Voltcraft VC free?

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

### Do ThetaCalc or Voltcraft VC have ads?

Neither ThetaCalc nor Voltcraft VC shows ads.

### Which is updated more often, ThetaCalc or Voltcraft VC?

ThetaCalc ships an update every 3 months, and Voltcraft VC every 2 months. Most recently, ThetaCalc was updated on October 1, 2026 and Voltcraft VC on October 19, 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.*