# Obelus Calculator vs HPBX Communicator

The clearest difference is update cadence: Obelus Calculator at weekly against HPBX Communicator's every 2 months. HPBX Communicator's advantage is device support (4 vs 1) and iOS requirement (15.6 vs 17.0). On price, ads and in-app purchases there is nothing between them.

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

Obelus Calculator ships an update weekly, HPBX Communicator every 2 months. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Obelus Calculator | HPBX Communicator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Size | 1 MB | 78 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Chris Wang](https://appshunter.io/developer/1723706836) | [MBIT Technologies Pty Ltd](https://appshunter.io/developer/1512323814) |

## What reviewers say

### Obelus Calculator

[App page](https://appshunter.io/ios/app/obelus-calculator/id6475239824)

**In-app purchases:** none


### HPBX Communicator

[App page](https://appshunter.io/ios/app/hpbx-communicator/id6751639990)

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

**In-app purchases:** none


## Frequently asked questions

### Is Obelus Calculator free?

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

### Is HPBX Communicator free?

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

### Do Obelus Calculator or HPBX Communicator have ads?

Neither Obelus Calculator nor HPBX Communicator shows ads.

### Which is updated more often, Obelus Calculator or HPBX Communicator?

Obelus Calculator ships an update weekly, and HPBX Communicator every 2 months. Most recently, Obelus Calculator was updated on November 4, 2026 and HPBX Communicator 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.*