# OEC Explorer vs Simple Math

The clearest difference is update cadence: Simple Math at fortnightly against OEC Explorer's every 2 months. OEC Explorer's advantage is iOS requirement (13.0 vs 15.6). On price, ads, 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.

OEC Explorer ships an update every 2 months, Simple Math fortnightly. The most recent releases landed on October 15, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | OEC Explorer | Simple Math |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 198 MB | 31 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [广东柏高保设备工程有限公司](https://appshunter.io/developer/1485674389) | [永生 刘](https://appshunter.io/developer/830484999) |

## What reviewers say

### OEC Explorer

[App page](https://appshunter.io/ios/app/oec-explorer/id1485674390)

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

**In-app purchases:** none


### Simple Math

[App page](https://appshunter.io/ios/app/simple-math-achieve-greatness/id1664655012)

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

**In-app purchases:** none


## Frequently asked questions

### Is OEC Explorer free?

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

### Is Simple Math free?

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

### Do OEC Explorer or Simple Math have ads?

Neither OEC Explorer nor Simple Math shows ads.

### Which is updated more often, OEC Explorer or Simple Math?

OEC Explorer ships an update every 2 months, and Simple Math fortnightly. Most recently, OEC Explorer was updated on October 15, 2026 and Simple Math on October 18, 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.*