# RF vs PROG_CALC

The clearest difference is price: PROG_CALC at Free against RF's $0.99. PROG_CALC also leads on update cadence (every 2 weeks vs every 8 months) and device support (4 vs 2). On ads, in-app purchases and iOS requirement there is nothing between them.

PROG_CALC is free to download; RF costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RF ships an update every 8 months, PROG_CALC every 2 weeks. The most recent releases landed on October 26, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | RF | PROG_CALC |
| --- | --- | --- |
| Price | $0.99 | **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 | No | No |
| Update frequency | Every 8 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 6 MB | 78 MB |
| Requires iOS | 13.0 | 13 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Julien Geissbuehler](https://appshunter.io/developer/1762554076) | [嘉欣 胡](https://appshunter.io/developer/1640395440) |

## What reviewers say

### RF

[App page](https://appshunter.io/ios/app/rf-calc/id647697327)

**Features:** macOS Compatibility

**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 RF free?

RF costs $0.99, with no in-app purchases.

### Is PROG_CALC free?

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

### Do RF or PROG_CALC have ads?

Neither RF nor PROG_CALC shows ads.

### Which is updated more often, RF or PROG_CALC?

RF ships an update every 8 months, and PROG_CALC every 2 weeks. Most recently, RF was updated on October 26, 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.*