# RC Circuit vs Any Formula

The clearest difference is monetization model: RC Circuit at free against Any Formula's freemium. RC Circuit also leads on iOS requirement (12.0 vs 18.0). Any Formula's advantage is update cadence (monthly vs every 6 months) and rating (5.0 vs 4.8). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. RC Circuit sells 1 one-off in-app purchase and Any Formula sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Any Formula holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 5 and 2 respectively.

RC Circuit ships an update every 6 months, Any Formula monthly. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | RC Circuit | Any Formula |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (5 ratings)](https://appshunter.io/ios/app/rc-circuit/id824460716/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/any-formula/id6761690225/reviews)** |
| Number of ratings | **5** | 2 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | **Free** | Freemium |
| Size | 16 MB | 3 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Aihotey LLC](https://appshunter.io/developer/1890912802) |

## What reviewers say

### RC Circuit

[App page](https://appshunter.io/ios/app/rc-circuit/id824460716)

Calculate RC charging and filter circuits, including time constants and cutoff frequencies. Find component values from these parameters or get voltage at specific times. Save and share data easily.

**Highlights:** Calculate time constant, Find component values, Get voltage at time t, Calculate cutoff frequency, Save data to CSV, Upload CSV via AirDrop/iCloud Drive, Multi-language support

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro features | $0.99 | one-time |


### Any Formula

[App page](https://appshunter.io/ios/app/any-formula/id6761690225)

Access a vast library of scientific, engineering, and financial formulas for instant calculations. Features smart input validation, customizable themes, and privacy-focused data handling. Unlock all formulas and advanced sharing options with a one-time purchase.

**Highlights:** 572 scientific, engineering, financial formulas, 9 formula categories, Smart input validation, Customizable themes (Light, Dark, Auto), Favorites and history, Unit customization and auto-conversion, Privacy-focused, no tracking

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Any Formula Pro | $2.99 | one-time |


## Frequently asked questions

### Is RC Circuit free?

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

### Is Any Formula free?

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

### Which has better reviews, RC Circuit or Any Formula?

Any Formula is rated higher. RC Circuit averages 4.8 out of 5 from 5 ratings, while Any Formula averages 5.0 from 2 ratings.

### Do RC Circuit or Any Formula have ads?

Neither RC Circuit nor Any Formula shows ads.

### Which is updated more often, RC Circuit or Any Formula?

RC Circuit ships an update every 6 months, and Any Formula monthly. Most recently, RC Circuit was updated on November 4, 2026 and Any Formula on October 31, 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.*