# Ordinary Calculator vs ERP

The clearest difference is ads: ERP at none against Ordinary Calculator's shown. Ordinary Calculator's advantage is iOS requirement (11.0 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly every 8 days. The most recent releases landed on October 22, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Ordinary Calculator | ERP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (35 ratings)](https://appshunter.io/ios/app/ordinary-calculator/id1661565434/reviews)** | — |
| Number of ratings | **35** | — |
| Positive reviews | 81.8% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 8 days | Every 8 days |
| Monetization | Ad-supported | — |
| Size | 67 MB | 19 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [奇锴 舒](https://appshunter.io/developer/1602906153) | [format-X GmbH](https://appshunter.io/developer/1144815065) |

## What reviewers say

### Ordinary Calculator

[App page](https://appshunter.io/ios/app/ordinary-calculator/id1661565434)

Perform basic arithmetic operations like addition, subtraction, multiplication, and division. This utility app features a history record and real-time display, allowing for editable calculations. It is available for free.

**Highlights:** Basic arithmetic operations, History record, Real-time display, Editable calculations, Free to use

**Features:** macOS Compatibility

**In-app purchases:** none


### ERP

[App page](https://appshunter.io/ios/app/erp-format-x/id6804618828)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ordinary Calculator free?

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

### Is ERP free?

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

### Do Ordinary Calculator or ERP have ads?

Ordinary Calculator shows ads; ERP does not.

### Which is updated more often, Ordinary Calculator or ERP?

Ordinary Calculator ships an update every 8 days, and ERP every 8 days. Most recently, Ordinary Calculator was updated on October 22, 2026 and ERP on October 29, 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.*