# Four Formula Calculator vs PROG_CALC

The clearest difference is ads: PROG_CALC at none against Four Formula Calculator's shown. PROG_CALC also leads on update cadence (every 2 weeks vs every 2 months) and device support (4 vs 2). On price, in-app purchases and iOS requirement there is nothing between them.

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

Four Formula Calculator ships an update every 2 months, PROG_CALC every 2 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Four Formula Calculator | PROG_CALC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/prog-calc/id1640426491/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 4 MB | 78 MB |
| Requires iOS | **12.0** | 13 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [嘉欣 胡](https://appshunter.io/developer/1640395440) |

## What reviewers say

### Four Formula Calculator

[App page](https://appshunter.io/ios/app/four-formula-calculator/id523405542)

**In-app purchases:** none


### PROG_CALC

[App page](https://appshunter.io/ios/app/prog-calc/id1640426491)

This app offers a programmable calculator with two distinct modes for daily computing and advanced mathematical functions. It supports system conversions between binary, octal, decimal, and hexadecimal, and allows for variable storage and code sharing.

**Highlights:** Basic and advanced calculation modes, Syntax parser, Variable storage and editing, Binary, octal, decimal, hexadecimal conversion, Built-in code examples, Code sharing via QR code or file

**In-app purchases:** none


## Frequently asked questions

### Is Four Formula Calculator free?

Four Formula Calculator is free to download, with no in-app purchases.

### Is PROG_CALC free?

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

### Do Four Formula Calculator or PROG_CALC have ads?

Four Formula Calculator shows ads; PROG_CALC does not.

### Which is updated more often, Four Formula Calculator or PROG_CALC?

Four Formula Calculator ships an update every 2 months, and PROG_CALC every 2 weeks. Most recently, Four Formula Calculator was updated on November 6, 2026 and PROG_CALC on November 3, 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.*