Comparison

Radioactivity vs Xplore Hiroshima

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

Head to head
About

Radioactivity

Features
Read full description

Radioactivity K12 Learning app helps us to know about Radioactive Decay, Nuclear Fission and Fusion. Our app makes it easy for kids and students to understand the uses and safety measures of Radioactivity. Our objective is to make this science concept simple to understand for students and get in-depth knowledge of the subject. There are three sections in the app: Each section is targeted to develop the student’s skills. Radioactivity app is designed to provide extra help for each and every physics student. Radiation & Radioactivity: This section explains the complete definition of Radiation, Radioactivity and Radioisotopes. *Radioactive Decay - There are three types of Radioactive Decay - namely Alpha Decay, Beta Decay and Gamma Decay based on the respective radiations Alpha, Beta and Gamma radiations. *Nuclear Fission - A large nucleus splits to form two smaller nuclei and some neutrons.This section explains two kinds of Nuclear Fission namely spontaneous fission and Neutron-induced fission. *Nuclear Fusion - Two small nuclei come together and join to form a large nucleus, releasing energy. 2) Uses & Safe Handling: This section explains about Uses & Safe Handling of Radioactive elements. Radioactivity is used for various functionalities in industries and medicine like Smoke detector, Thickness measurement, Leak detection. 3) Quiz: An interactive quiz to check the knowledge with score board. Download the Radioactivity app and other K12 educational apps published by Ajax Media Tech and make your kids shine in science.

About

Xplore Hiroshima

Explore Hiroshima's history through interactive maps, 3D models, and survivor testimonies. Understand the impact of the atomic bombing and learn from the resilience of its people.

Highlights
  • Interactive historical maps
  • 3D models of bomb and dome
  • Survivor testimonies with art
  • Video footage from the bombing
  • Guided tour of Peace Park sites
  • Toggle between past and present views
Features
Read full description

On August 6, 1945, the first atomic bomb ever used in war was dropped on Hiroshima, Japan, ushering in the nuclear age. Within 10 seconds, blistering heat, blast winds, and deadly radiation reduced a once vibrant and bustling city to rubble and ash. Hiroshima's atomic bomb survivors, or in Japanese, hibakusha, have been working tirelessly for 75 years to ensure that what happened to them will never happen again, anywhere on Earth. What did the people living in Hiroshima experience? How is Hiroshima's past and present relevant to our own lives? And how can the stories of hibakusha inspire us to create a more sustainable and peaceful future? During this tour, local guides Mary (American), and Haruki (Japanese) will introduce Hiroshima Peace Park, formerly Nakajima District, one of Hiroshima's busiest downtown centers and the target of the atomic bombing. You will see video footage from the day, toggle between maps of past and present Hiroshima, interact with 3D models of Little Boy, the A-bomb fireball, and the Atomic Bomb Dome, and hear the testimonies of hibakusha accompanied by art they created to convey their experiences. Stops include the Atomic Bomb Dome and Rest House, two A-bombed buildings that remain in the Peace Park even today, the hypocenter of the atomic bombing, the Cenotaph for the A-bomb Victims, and the Sadako Sasaki inspired Children's Peace Monument.

Screenshots

Xplore Hiroshima4 screens

Verdict

The call

The clearest difference is price: Xplore Hiroshima at Free against Radioactivity's $0.99. Xplore Hiroshima also leads on device support (3 vs 1). On update cadence, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Xplore Hiroshima is free to download; Radioactivity costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Radioactivity ships an update every 36 months, Xplore Hiroshima every 20 months. The most recent releases landed on October 3, 2026 and October 5, 2026 respectively.

Scorecard2 real differences · 7 level
Radioactivity versus Xplore Hiroshima: the parameters behind the verdict, then further details
ParameterRadioactivityXplore Hiroshima
Price$0.99Free — better
Rating—5.0 (3 ratings) — better
Number of ratings—3 — better
Update frequencyEvery 36 monthsEvery 20 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPadiPhone, iPad, iPod — better
Requires iOS12.011.0 — better
Further details — not scored
Size52 MB569 MB
Age rating4+4+
Developerwww.ajaxmediatech.comTIMELOOPER INC

In-app purchases

None

Radioactivity

No in-app purchases

None

Xplore Hiroshima

No in-app purchases

Questions

Is Radioactivity free?
Radioactivity costs $0.99, with no in-app purchases.
Is Xplore Hiroshima free?
Xplore Hiroshima is free to download, with no in-app purchases.
Do Radioactivity or Xplore Hiroshima have ads?
Neither Radioactivity nor Xplore Hiroshima shows ads.
Which is updated more often, Radioactivity or Xplore Hiroshima?
Radioactivity ships an update every 36 months, and Xplore Hiroshima every 20 months. Most recently, Radioactivity was updated on October 3, 2026 and Xplore Hiroshima on October 5, 2026.

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