# ThemeCalc vs Calculator Plug

The clearest difference is ads: Calculator Plug at none against ThemeCalc's shown. Calculator Plug also leads on iOS requirement (15.1 vs 18.0). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. ThemeCalc sells 17 in-app purchases, starting at $0.99 per month and Calculator Plug sells 4 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

ThemeCalc ships an update every 6 days, Calculator Plug every 4 days. The most recent releases landed on October 18, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | ThemeCalc | Calculator Plug |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calculator-plug/id6775307587/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 days | **Every 4 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 42 MB | 34 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nguyen Toan Le](https://appshunter.io/developer/1462706953) | [Mark Gabrielli](https://appshunter.io/developer/6775036752) |

## What reviewers say

### ThemeCalc

[App page](https://appshunter.io/ios/app/themecalc-math-and-calculator/id6605930538)

Enhance your math experience with a powerful scientific calculator featuring over 40 aesthetic themes. It offers a professional engine for various math levels, a programmer mode, and a history tape for easy recall. Customize your calculator's look and feel while tackling complex problems.

**Highlights:** Professional scientific calculator engine, 40+ aesthetic themes, Programmer mode (HEX, DEC, OCT, BIN), History tape for past calculations, Haptic feedback, Customizable layouts

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

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $0.99 | per month |
| Premium Yearly | $5.99 | per year |
| Solar Flare | $1.99 | one-time |
| Valhalla Viking | $1.99 | one-time |
| Sakura Zen Garden | $1.99 | one-time |
| Atlantis Deep | $1.99 | one-time |
| Quantum Processor | $1.99 | one-time |
| Casio fx-991ES Theme | $1.99 | one-time |
| Casio fx-115ES Theme | $1.99 | one-time |
| Casio fx-570VN Theme | $1.99 | one-time |
| Casio fx-350MS Theme | $1.99 | one-time |
| Casio fx-580VN X Theme | $1.99 | one-time |
| Casio fx-CG50 Theme | $1.99 | one-time |
| Casio fx-92 Collège Theme | $1.99 | one-time |
| Casio fx-5800P Theme | $1.99 | one-time |
| Casio fx-9860GII Theme | $1.99 | one-time |
| Unlock Everything | $9.99 | one-time |


### Calculator Plug

[App page](https://appshunter.io/ios/app/calculator-plug/id6775307587)

Access over 450 specialized calculators for construction, finance, health, trades, and more. This app offers a clean, offline-capable interface for quick, accurate calculations without intrusive ads.

**Highlights:** 450+ searchable calculators, Offline functionality, Clean dark interface, Construction calculators, Finance calculators, Health and fitness calculators, Trades calculators

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $5.99 | per month |
| Pro+ Monthly | $9.99 | per month |
| Pro Lifetime | $29.99 | one-time |
| Pro+ Lifetime | $44.99 | one-time |


## Frequently asked questions

### Is ThemeCalc free?

ThemeCalc is free to download, with in-app purchases available.

### Is Calculator Plug free?

Calculator Plug is free to download, with in-app purchases available.

### Do ThemeCalc or Calculator Plug have ads?

ThemeCalc shows ads; Calculator Plug does not.

### Which is updated more often, ThemeCalc or Calculator Plug?

ThemeCalc ships an update every 6 days, and Calculator Plug every 4 days. Most recently, ThemeCalc was updated on October 18, 2026 and Calculator Plug on October 14, 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.*