# CalConvert vs Plumb BillPay

The clearest difference is price: Plumb BillPay at Free against CalConvert's $24.99. Plumb BillPay also leads on rating (5.0 vs 4.6). CalConvert's advantage is ratings volume (299 vs 3). On update cadence, ads, in-app purchases and device support there is nothing between them.

Plumb BillPay is free to download; CalConvert costs $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Plumb BillPay holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: CalConvert has 299 ratings behind it against 3, so its average is the more settled of the two.

CalConvert ships an update every 5 weeks, Plumb BillPay every 4 weeks. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | CalConvert | Plumb BillPay |
| --- | --- | --- |
| Price | $24.99 | **Free** |
| Rating | [4.6 (299 ratings)](https://appshunter.io/ios/app/calconvert-pro-calculator/id420224323/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/plumb-billpay/id6447216735/reviews)** |
| Number of ratings | **299** | 3 |
| Positive reviews | 75.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 weeks** |
| Monetization | Paid | **Free** |
| Size | 267 MB | 42 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Maple Media Apps, LLC](https://appshunter.io/developer/1289801633) | [Think Plumb, LLC](https://appshunter.io/developer/1680620162) |

## What reviewers say

### CalConvert

[App page](https://appshunter.io/ios/app/calconvert-pro-calculator/id420224323)

This app offers a powerful scientific calculator, extensive unit conversion capabilities across dozens of categories, and real-time foreign exchange rates for over 150 currencies. It also includes a world clock and convenient home screen widgets for quick access to its functions.

**Highlights:** Advanced scientific calculator, Extensive unit conversions (600+ units), Real-time currency exchange rates (150+ currencies), World Clock functionality, Home screen widgets for quick access, Calculation history tape

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Comprehensive and easy to use
- 🎨 Variety of skins/themes
- 💻 Works great on iPad
- ⚙️ Powerful scientific/conversion features
- 🔍 Clear and readable display

**What reviewers complain about**

- 🐛 Bugs with screen layout and display issues
- 🔄 Slow startup/loading times
- 🔧 Lack of updates and maintenance
- 🔊 Audio focus issues with other apps
- 🔒 Lack of Retina support in paid version

**Reported bugs**

- Screen layout issues in iPad portrait mode
- Inconsistent behavior when switching between portrait and landscape
- Paid version lacks Retina display support

**Requested features**

- Add widget support for quick calculations
- Implement fraction and tip calculator features
- Expand scientific functions for Apple Watch
- Improve memory management and performance
- Add customization options like dark mode


### Plumb BillPay

[App page](https://appshunter.io/ios/app/plumb-billpay/id6447216735)

Easily approve bills, track payment status, and communicate with your financial advisors. This app offers a secure and intuitive way to manage your finances on the go, providing quick access to all bill information and reports.

**Highlights:** Bill approval workflow, Payment status tracking, Bill information access, Expense detail viewing, Communication with advisors, Bill upload options

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

**In-app purchases:** none


## Frequently asked questions

### Is CalConvert free?

CalConvert costs $24.99, with no in-app purchases.

### Is Plumb BillPay free?

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

### Which has better reviews, CalConvert or Plumb BillPay?

Plumb BillPay is rated higher. CalConvert averages 4.6 out of 5 from 299 ratings, while Plumb BillPay averages 5.0 from 3 ratings.

### Do CalConvert or Plumb BillPay have ads?

Neither CalConvert nor Plumb BillPay shows ads.

### Which is updated more often, CalConvert or Plumb BillPay?

CalConvert ships an update every 5 weeks, and Plumb BillPay every 4 weeks. Most recently, CalConvert was updated on November 1, 2026 and Plumb BillPay on October 30, 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.*