# PFD Calc vs The Base Converter

The clearest difference is ads: The Base Converter at none against PFD Calc's shown. The Base Converter also leads on update cadence (fortnightly vs every 5 weeks). On price, in-app purchases, device support 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.

PFD Calc ships an update every 5 weeks, The Base Converter fortnightly. The most recent releases landed on October 5, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | PFD Calc | The Base Converter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Size | 14 MB | 1 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kazuhisa Kobayashi](https://appshunter.io/developer/1580882000) | [Alexander Lee](https://appshunter.io/developer/1795808485) |

## What reviewers say

### PFD Calc

[App page](https://appshunter.io/ios/app/pfd-calc-prime-factorization/id6737405828)

**Features:** macOS Compatibility

**In-app purchases:** none


### The Base Converter

[App page](https://appshunter.io/ios/app/the-base-converter/id6743086704)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PFD Calc free?

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

### Is The Base Converter free?

The Base Converter is free to download, with no in-app purchases.

### Do PFD Calc or The Base Converter have ads?

PFD Calc shows ads; The Base Converter does not.

### Which is updated more often, PFD Calc or The Base Converter?

PFD Calc ships an update every 5 weeks, and The Base Converter fortnightly. Most recently, PFD Calc was updated on October 5, 2026 and The Base Converter on October 1, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*