Cliff Timer vs Mobile Booklet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cliff Timer
Calculate the height of lightning strikes using a simple stopwatch and physics formulas. Measure the time between seeing lightning and hearing thunder to determine distance and height.
- Lightning height calculation
- Lightning distance calculation
- Uses physics formulas
- Simple stopwatch interface
- Real-time results
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Cliff Timer is a simple and powerful app that lets you measure real-world distances using just a stopwatch and basic physics. By timing how long it takes for an object to fall, you can estimate the height of cliffs and other drops, or measure how far away a storm is by counting the seconds between lightning and thunder. Designed to be easy to use while still based on real equations, Cliff Timer turns quick observations into meaningful measurements, making it perfect for outdoor exploration, learning, or satisfying your curiosity about the world around you. This app uses the formula for height, h=12⋅g⋅t^2, and the formula for lightning, d=t/5. Start the stopwatch, and the app will give you the information.
Mobile Booklet
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Introducing the Eastern Camp Mobile Booklet Enjoy the convenience of having the full camp booklet right on your mobile device. The app includes everything found in the printed booklet, plus exclusive features only available on iOS. Stay informed with real-time updates and receive notifications for the latest news and changes at camp!
Screenshots
Verdict
The clearest difference is in-app purchases: Mobile Booklet at none against Cliff Timer's 3. Mobile Booklet also leads on update cadence (monthly vs every 5 months) and iOS requirement (15.6 vs 17.0). On price, ads 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
Both are free to download. Cliff Timer sells 3 in-app purchases, starting at $0.99 per month. Mobile Booklet asks for nothing beyond the download.
Cliff Timer ships an update every 5 months, Mobile Booklet monthly. The most recent releases landed on September 14, 2026 and September 12, 2026 respectively.
| Parameter | Cliff Timer | Mobile Booklet |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (10 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | Every 5 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 16 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | Frank Schipani | Julian Gombos |
In-app purchases
Cliff Timer
- Monthly3 Days trial$0.991 Month
- Yearly$5.991 Year
- Lightning Distance Access$1.99
Mobile Booklet
No in-app purchases
