Comparison

Cosmic Ray Detector SORAMAME vs when

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

Head to head
About

Cosmic Ray Detector SORAMAME

Turn your smartphone into a cosmic ray detector and contribute to real-time space research. Capture invisible high-energy particles from deep space using your device's camera sensor and see detections from around the world.

Highlights
  • Real-time cosmic ray detection
  • Global observation map
  • Offline data saving
  • Privacy-friendly location blurring
  • Easy setup with no extra hardware
  • Light-leak detection
Features
Read full description

Discover the invisible universe right in your pocket! SORAMAME is an innovative citizen science app that transforms your smartphone into a real cosmic ray detector. Every second, invisible high-energy particles from deep space are raining down on Earth. By using your device's camera sensor, SORAMAME allows you to capture and record these microscopic cosmic events. Whether you are a science enthusiast, a student, or just curious about the universe, you can easily contribute to global space research. Simply cover your rear camera to block out all light, press play, and let your smartphone catch the invisible hits from the cosmos! ## How It Works Your smartphone's CMOS image sensor is highly sensitive not just to visible light, but also to high-energy particles like muons. When the camera is completely shielded from light, the sensor acts as a particle detector. When a cosmic ray strikes the sensor, it leaves a faint but detectable signal—which SORAMAME captures and analyzes in real-time. ## Key Features Real-Time Detection: Watch your screen as cosmic ray hits are detected and recorded instantly. Global Observation Map: See where cosmic rays are being detected around the world! Your data contributes to a global map shared by other citizen scientists. Offline Mode: Exploring off the grid? No problem. SORAMAME saves your detection data (images and coordinates) locally when you are offline and automatically uploads it to the central server once your network connection is restored. Privacy-Friendly: Your location data is slightly blurred on the public map to ensure your privacy remains fully protected. Easy Setup: No extra hardware required. Just a smartphone and a dark environment (or a simple piece of black tape to cover the lens). ## Important Note for Accurate Measurement To detect cosmic rays accurately, the camera sensor must be in complete darkness. Please shield the rear camera from light entirely. The app includes a light-leak detection feature and will alert you (ERROR: Please shield the rear camera from light) if the environment is too bright. For best results, we recommend leaving the app running for at least 3 hours to stabilize the background noise learning. Join the SORAMAME project today, and let's map the cosmic rays of our universe together! https://soramame.n.kanagawa-u.ac.jp/en/

About

when

Features
Read full description

"四次元年表" is a project where users collaborate to build a database that encompasses all historical events, from the origins of the universe to the endless "now", regardless of the field. It aims to accurately display both temporal and spatial distances by making "where" as important as "when".

Screenshots

Cosmic Ray Detector SORAMAME3 screens
when4 screens

Verdict

The call

The clearest difference is iOS requirement: when at 13.0 against Cosmic Ray Detector SORAMAME's 15.0. On price, update cadence, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Cosmic Ray Detector SORAMAME ships an update every 2 weeks, when every 3 weeks. The most recent releases landed on October 8, 2026 and October 16, 2026 respectively.

Scorecard1 real difference · 9 level
Cosmic Ray Detector SORAMAME versus when: the parameters behind the verdict, then further details
ParameterCosmic Ray Detector SORAMAMEwhen
PriceFreeFree
Rating4.8 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size112 MB30 MB
Age rating4+4+
DeveloperBLUEPAGE Greetings LLCHiroe Oshimura

In-app purchases

None

Cosmic Ray Detector SORAMAME

No in-app purchases

None

when

No in-app purchases

Questions

Is Cosmic Ray Detector SORAMAME free?
Cosmic Ray Detector SORAMAME is free to download, with no in-app purchases.
Is when free?
when is free to download, with no in-app purchases.
Do Cosmic Ray Detector SORAMAME or when have ads?
Neither Cosmic Ray Detector SORAMAME nor when shows ads.
Which is updated more often, Cosmic Ray Detector SORAMAME or when?
Cosmic Ray Detector SORAMAME ships an update every 2 weeks, and when every 3 weeks. Most recently, Cosmic Ray Detector SORAMAME was updated on October 8, 2026 and when on October 16, 2026.

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