# PROG_CALC vs Radiator Calculator Pro

The clearest difference is review sentiment: PROG_CALC at 100% against Radiator Calculator Pro's 0%. PROG_CALC also leads on in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 3 months). On price and ads there is nothing between them.

Both are free to download. Radiator Calculator Pro sells 1 one-off in-app purchase. PROG_CALC asks for nothing beyond the download.

PROG_CALC ships an update every 2 weeks, Radiator Calculator Pro every 3 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | PROG_CALC | Radiator Calculator Pro |
| --- | --- | --- |
| 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** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | **Free** | Paid |
| Size | 78 MB | 16 MB |
| Requires iOS | **13** | 26.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [嘉欣 胡](https://appshunter.io/developer/1640395440) | [DigitalKind Ltd](https://appshunter.io/developer/1557937157) |

## What reviewers say

### 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


### Radiator Calculator Pro

[App page](https://appshunter.io/ios/app/radiator-calculator-pro/id6743349772)

Accurately calculate the heating requirements for any room in your home. This tool supports unlimited rooms, offers precise calculations in Watts and BTU, and features a clean, intuitive design with dark mode support.

**Highlights:** Calculate heating requirements, Support for all room types, Precise Watts and BTU output, Unlimited room saving, Intuitive user interface, Dark mode support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Radiator Calculator PRO | $3.99 | one-time |


## Frequently asked questions

### Is PROG_CALC free?

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

### Is Radiator Calculator Pro free?

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

### Do PROG_CALC or Radiator Calculator Pro have ads?

Neither PROG_CALC nor Radiator Calculator Pro shows ads.

### Which is updated more often, PROG_CALC or Radiator Calculator Pro?

PROG_CALC ships an update every 2 weeks, and Radiator Calculator Pro every 3 months. Most recently, PROG_CALC was updated on November 3, 2026 and Radiator Calculator Pro on November 4, 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.*