# NHD vs Keystone Connection

The clearest difference is rating: NHD at 4.7 against Keystone Connection's 1.3. Keystone Connection's advantage is ads (none vs shown) and update cadence (every 6 weeks vs every 11 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

NHD holds the better App Store score, 4.7 against 1.3. That said, the two scores are not equally well evidenced: Keystone Connection has 47 ratings behind it against 6, so its average is the more settled of the two.

NHD ships an update every 11 months, Keystone Connection every 6 weeks. The most recent releases landed on September 15, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | NHD | Keystone Connection |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (6 ratings)](https://appshunter.io/ios/app/nhd-ca/id1373343639/reviews)** | [1.3 (47 ratings)](https://appshunter.io/ios/app/keystone-connection/id1643478570/reviews) |
| Number of ratings | 6 | **47** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 11 months | **Every 6 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 44 MB | 150 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sacramento County Office of Education](https://appshunter.io/developer/508064349) | [Cinc Systems, LLC](https://appshunter.io/developer/673135886) |

## What reviewers say

### NHD

[App page](https://appshunter.io/ios/app/nhd-ca/id1373343639)

This app helps participants navigate and stay updated on the National History Day - California State Contest. Create a personalized schedule for student projects like exhibits, documentaries, and websites, and use built-in maps and agendas to explore the competition.

**Highlights:** Create custom event schedules, View student project details, Access contest maps, Check event agendas, Stay updated on contest news

**Features:** macOS Compatibility

**In-app purchases:** none


### Keystone Connection

[App page](https://appshunter.io/ios/app/keystone-connection/id1643478570)

Manage your community association from your mobile device. Make payments, view your account, access important documents, and submit requests. Designed for both homeowners and board members to streamline community interaction.

**Highlights:** Make payments, View account ledger, Access community documents, Submit ACC requests, Submit work orders, Manage violations, Board tasks and reviews

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

**In-app purchases:** none


## Frequently asked questions

### Is NHD free?

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

### Is Keystone Connection free?

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

### Which has better reviews, NHD or Keystone Connection?

NHD is rated higher. NHD averages 4.7 out of 5 from 6 ratings, while Keystone Connection averages 1.3 from 47 ratings.

### Do NHD or Keystone Connection have ads?

NHD shows ads; Keystone Connection does not.

### Which is updated more often, NHD or Keystone Connection?

NHD ships an update every 11 months, and Keystone Connection every 6 weeks. Most recently, NHD was updated on September 15, 2026 and Keystone Connection on September 24, 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.*