Jet Ski Addition vs LJCDS100
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Jet Ski Addition
Race jet skis against other players worldwide while practicing addition facts. Your speed depends on how quickly you solve math problems. A fun way to improve arithmetic skills.
- Multiplayer racing
- Addition fact practice
- Speed based on math answers
- Global competition
- Educational gameplay
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Jet Ski Addition is a multiplayer racing game that allows students from anywhere in the world to race one another while practicing their addition facts. Your jet ski's speed is determined by how fast you answer the addition problems.
LJCDS100
This app celebrates a school's 100th anniversary by allowing users to share memories, view event details, and receive timely notifications. It serves as a digital hub for community connection during the historic Centennial celebration.
- Centennial Memory Share with stickers and tags
- Upload photos and videos
- Events Calendar for anniversary celebrations
- Push notifications for events and news
- Community connection hub
- No login required
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Celebrate 100 years of La Jolla Country Day School with the official LJCDS 100 Year App - your digital hub for memories, events, and community connection during this historic Centennial. Key Features Centennial Memory Share Capture and upload photos or videos from special LJCDS moments! Add stickers and tags to personalize your memories, then see approved submissions appear in the public feed for the whole LJCDS community to enjoy. Events Calendar Stay up to date with every Centennial celebration. View dates, times, and details for all official anniversary events—without digging through the full school calendar. Push Notifications Get timely reminders about upcoming events, community news, and opportunities to participate in Centennial activities. Never miss a moment of the celebration. Why Download? The LJCDS 100 Year App makes it easy to share memories, stay connected, and celebrate together - whether you’re a student, faculty member, alum, or friend of the community. No login required, just instant access to everything Centennial.
Screenshots
Verdict
The clearest difference is price: LJCDS100 at Free against Jet Ski Addition's $0.99. LJCDS100 also leads on rating (5.0 vs 3.5) and update cadence (every 5 weeks vs every 22 months). Jet Ski Addition's advantage is ratings volume (19 vs 1) and iOS requirement (6.0 vs 15.6). On ads, in-app purchases and device support 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
LJCDS100 is free to download; Jet Ski Addition costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
LJCDS100 holds the better App Store score, 5.0 against 3.5. That said, the two scores are not equally well evidenced: Jet Ski Addition has 19 ratings behind it against 1, so its average is the more settled of the two.
Jet Ski Addition ships an update every 22 months, LJCDS100 every 5 weeks. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.
| Parameter | Jet Ski Addition | LJCDS100 |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 3.5 (19 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 57.1% of reviews | — |
| Number of ratings | 19 — better | 1 |
| Update frequency | Every 22 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 6.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 24 MB | 65 MB |
| Age rating | 4+ | 4+ |
| Developer | Arcademics | La Jolla Country Day School |
Customer experience
Jet Ski Addition
LJCDS100
In-app purchases
Jet Ski Addition
No in-app purchases
LJCDS100
No in-app purchases
Questions
Is Jet Ski Addition free?
Is LJCDS100 free?
Which has better reviews, Jet Ski Addition or LJCDS100?
Do Jet Ski Addition or LJCDS100 have ads?
Which is updated more often, Jet Ski Addition or LJCDS100?
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