# OPCMIA Events vs UnionMap

The clearest difference is update cadence: UnionMap at weekly against OPCMIA Events's every 10 months. UnionMap also leads on iOS requirement (15.1 vs 17.0). 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.

OPCMIA Events ships an update every 10 months, UnionMap weekly. The most recent releases landed on October 25, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | OPCMIA Events | UnionMap |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Weekly** |
| Size | 69 MB | 43 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [OPERATIVE PLASTERERS & CEMENT MASONS INTERNATIONAL ASSOCIATION INC](https://appshunter.io/developer/1473029472) | [JPH Technology, Inc.](https://appshunter.io/developer/1710902680) |

## What reviewers say

### OPCMIA Events

[App page](https://appshunter.io/ios/app/opcmia-events/id1473029473)

**Features:** macOS Compatibility

**In-app purchases:** none


### UnionMap

[App page](https://appshunter.io/ios/app/unionmap/id6464222675)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OPCMIA Events free?

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

### Is UnionMap free?

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

### Do OPCMIA Events or UnionMap have ads?

Neither OPCMIA Events nor UnionMap shows ads.

### Which is updated more often, OPCMIA Events or UnionMap?

OPCMIA Events ships an update every 10 months, and UnionMap weekly. Most recently, OPCMIA Events was updated on October 25, 2026 and UnionMap on October 13, 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.*