# NHD vs Eyewitness Maintenance

The clearest difference is ads: Eyewitness Maintenance at none against NHD's shown. 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.

NHD ships an update every 11 months, Eyewitness Maintenance every 21 months. The most recent releases landed on September 15, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | NHD | Eyewitness Maintenance |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (6 ratings)](https://appshunter.io/ios/app/nhd-ca/id1373343639/reviews)** | — |
| Number of ratings | **6** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 11 months** | Every 21 months |
| Monetization | Ad-supported | — |
| Size | 44 MB | 24 MB |
| Requires iOS | **14.0** | 14.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sacramento County Office of Education](https://appshunter.io/developer/508064349) | [The Siroky Group Inc.](https://appshunter.io/developer/614590616) |

## 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


### Eyewitness Maintenance

[App page](https://appshunter.io/ios/app/eyewitness-maintenance/id1449769481)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NHD free?

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

### Is Eyewitness Maintenance free?

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

### Do NHD or Eyewitness Maintenance have ads?

NHD shows ads; Eyewitness Maintenance does not.

### Which is updated more often, NHD or Eyewitness Maintenance?

NHD ships an update every 11 months, and Eyewitness Maintenance every 21 months. Most recently, NHD was updated on September 15, 2026 and Eyewitness Maintenance 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.*