# NHD vs CNStopwatch

The clearest difference is update cadence: CNStopwatch at every 3 weeks against NHD's every 11 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.

NHD ships an update every 11 months, CNStopwatch every 3 weeks. The most recent releases landed on September 15, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | NHD | CNStopwatch |
| --- | --- | --- |
| 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 | Yes |
| Update frequency | Every 11 months | **Every 3 weeks** |
| Monetization | Ad-supported | — |
| Size | 44 MB | 30 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Sacramento County Office of Education](https://appshunter.io/developer/508064349) | [Raj Shah](https://appshunter.io/developer/1610101713) |

## 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


### CNStopwatch

[App page](https://appshunter.io/ios/app/cnstopwatch/id6502687261)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is NHD free?

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

### Is CNStopwatch free?

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

### Do NHD or CNStopwatch have ads?

Both NHD and CNStopwatch show ads.

### Which is updated more often, NHD or CNStopwatch?

NHD ships an update every 11 months, and CNStopwatch every 3 weeks. Most recently, NHD was updated on September 15, 2026 and CNStopwatch on September 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*