NHD vs Keystone Connection
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NHD
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.
- Create custom event schedules
- View student project details
- Access contest maps
- Check event agendas
- Stay updated on contest news
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The official National History Day - California (NHD-CA) app gives you the tools to navigate and stay up-to-date on the NHD-CA State Contest. The NHD-CA app allows you to create your own schedule of student-produced exhibits, documentaries, historical papers, performances, posters, and websites. The app also helps navigate the competition with maps, agendas, and much more!
Keystone Connection
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.
- Make payments
- View account ledger
- Access community documents
- Submit ACC requests
- Submit work orders
- Manage violations
- Board tasks and reviews
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The KPPM Connection Homeowner and Board App is a mobile-friendly way to interface with your community association. You will be able to make payments, view your account, and access community information all in one place. If you already have a login to your association website, you can log in to the App using the same email address and password you use for your association website. If you do not have a current login to your association site, simply click the register button and submit your information. Once your registration is approved, you will receive an email with a link to set your password and then you will be able to log into your account directly from this app. If you already have a login and do not remember your password, click the Forgot Password link, enter your email address to request a password reset and you will receive an email with a link to set your password. Once set, you can log in with your email address and new password. Once logged in, Homeowners will have direct access to the following features: a. Easily switch between accounts if multiple properties are owned b. Homeowner Dashboard c. Access association documents d. Access association directories e. Access association photos f. Access Contact Us Page g. Pay Assessments h. Access violations – add comments and take pictures from mobile device to add to violation i. Submit ACC Requests and include pictures and attachments (pictures can be taken from mobile device) j. Access homeowner ledger k. Submit work orders and check on status of their work orders (add comments and take pictures from mobile device) In addition, Board Members will be able to take advantage of the following features: a. Board Tasks b. ACC Review c. Board documents d. Violations Review e. Invoice Approval f. Work Order Review
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | NHD | Keystone Connection |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (6 ratings) — better | 1.3 (47 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 6 | 47 — better |
| Update frequency | Every 11 months | Every 6 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 44 MB | 150 MB |
| Age rating | 4+ | 4+ |
| Developer | Sacramento County Office of Education | Cinc Systems, LLC |
Customer experience
NHD
Keystone Connection
In-app purchases
NHD
No in-app purchases
Keystone Connection
No in-app purchases
Questions
Is NHD free?
Is Keystone Connection free?
Which has better reviews, NHD or Keystone Connection?
Do NHD or Keystone Connection have ads?
Which is updated more often, NHD or Keystone Connection?
Other comparisons
