# ABC Keystone vs OPMCA

The clearest difference is update cadence: ABC Keystone at every 2 months against OPMCA's every 26 months. 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.

ABC Keystone ships an update every 2 months, OPMCA every 26 months. The most recent releases landed on October 5, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | ABC Keystone | OPMCA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/abc-keystone/id1250312123/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 26 months |
| Monetization | Free | — |
| Size | 48 MB | 49 MB |
| Requires iOS | 13.4 | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Keystone Chapter Associated Builders & Contractors Inc](https://appshunter.io/developer/1473164003) | [Oklahoma Petroleum Marketers Association](https://appshunter.io/developer/1500525187) |

## What reviewers say

### ABC Keystone

[App page](https://appshunter.io/ios/app/abc-keystone/id1250312123)

Discover local member builders, innovative home design trends, and construction news. Access member discounts, event calendars, and industry information. An indispensable tool for consumers and industry professionals.

**Highlights:** Discover member builders, Home design trends, Access member discounts, View business listings, Industry news and events, Government affairs information

**Features:** macOS Compatibility

**In-app purchases:** none


### OPMCA

[App page](https://appshunter.io/ios/app/opmca/id1500525188)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ABC Keystone free?

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

### Is OPMCA free?

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

### Do ABC Keystone or OPMCA have ads?

Neither ABC Keystone nor OPMCA shows ads.

### Which is updated more often, ABC Keystone or OPMCA?

ABC Keystone ships an update every 2 months, and OPMCA every 26 months. Most recently, ABC Keystone was updated on October 5, 2026 and OPMCA on September 14, 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.*