# ThetaCalc vs Axiomeer

The clearest difference is update cadence: Axiomeer at every 2 days against ThetaCalc's every 3 months. On price, ads, in-app purchases and device support 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, Axiomeer every 2 days. The most recent releases landed on November 3, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | ThetaCalc | Axiomeer |
| --- | --- | --- |
| 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 days** |
| Monetization | Free | — |
| Size | 1 MB | 7 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Felix Stehli](https://appshunter.io/developer/1521614638) | [JESUS MARIO SUBIAS DOMINGO](https://appshunter.io/developer/1024071884) |

## 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


### Axiomeer

[App page](https://appshunter.io/ios/app/axiomeer/id6759169671)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ThetaCalc free?

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

### Is Axiomeer free?

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

### Do ThetaCalc or Axiomeer have ads?

Neither ThetaCalc nor Axiomeer shows ads.

### Which is updated more often, ThetaCalc or Axiomeer?

ThetaCalc ships an update every 3 months, and Axiomeer every 2 days. Most recently, ThetaCalc was updated on November 3, 2026 and Axiomeer on November 9, 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.*