Comparison

Hourglass vs RadMonJP

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Hourglass

Features
Read full description

This is an approximately 3-minute hourglass that uses physics simulation to recreate realistic movements. You can enjoy watching the grains of sand smoothly fall under natural gravity while keeping track of time. With a simple and intuitive design, it's an ideal tool for meditation or improving focus. When the gyroscope sensor is enabled, the movement of the sand adjusts in real-time according to the tilt of your device. Each session offers a different atmosphere, allowing you to relax and experience the comforting analog feel within a digital space.

About

RadMonJP

Read full description

RadMonJP is a radiation monitoring app that helps you check radiation levels across Japan in real time. Key features: - Browse monitoring posts nationwide in a clear dashboard - View radiation levels on an interactive map - Check rankings to quickly identify higher readings - See each monitoring post's current reading, weather, and 24-hour trend - Customize daily reports and emergency alerts Whether you are checking conditions near home or planning a trip, RadMonJP helps you find the information you need quickly for greater peace of mind for you and your family. This app is supported by advertising. Join the annual sponsorship program to remove ads and support future development. Privacy Policy: https://radmon.jp/privacy Terms of Use: https://radmon.jp/terms

Screenshots

Hourglass2 screens
RadMonJP4 screens

Verdict

The call

The clearest difference is in-app purchases: Hourglass at none against RadMonJP's 6. Hourglass also leads on iOS requirement (16.0 vs 26.0). RadMonJP's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. RadMonJP sells 6 in-app purchases, starting at $0.99 per month. Hourglass asks for nothing beyond the download.

UpkeepUpdate frequency

Hourglass ships an update every 4 days, RadMonJP every 8 days. Both last shipped on October 19, 2026.

Scorecard3 real differences Β· 3 level
Hourglass versus RadMonJP: the parameters behind the verdict, then further details
ParameterHourglassRadMonJP
PriceFreeFree
Update frequencyEvery 4 days β€” betterEvery 8 days
AdsYesNo β€” better
In-app purchasesNo β€” betterYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 β€” better26.0
Further details β€” not scored
Size27 MB10 MB
Age rating4+4+
Developerkenji abeRR Aware Studio

In-app purchases

None

Hourglass

No in-app purchases

6 purchases

RadMonJP

Subscriptions6
  • γƒ—γƒ¬γƒŸγ‚’γƒ 1γƒΆζœˆ$0.991 Month
  • Bronze$4.991 Year
  • Silver sponsor$9.991 Year
Show 3 more
  • Gold sponsor$19.991 Year
  • Platinum sponsor$49.991 Year
  • Diamond sponsor$99.991 Year

Questions

Is Hourglass free?
Hourglass is free to download, with no in-app purchases.
Is RadMonJP free?
RadMonJP is free to download, with in-app purchases available.
Do Hourglass or RadMonJP have ads?
Hourglass shows ads; RadMonJP does not.
Which is updated more often, Hourglass or RadMonJP?
Hourglass ships an update every 4 days, and RadMonJP every 8 days. Most recently, Hourglass was updated on October 19, 2026 and RadMonJP on October 19, 2026.

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