Comparison

Radioactivity vs Atomic Spectra

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

Atomic Spectra

This reference app provides detailed information on strong line atomic emission spectra within the visible range. Users can search for elements by name, symbol, or atomic number and inspect individual spectra lines. It offers interactive features to visualize and navigate spectral data.

Highlights
  • Visible range spectra (380-740nm)
  • Search by element name, symbol, or atomic number
  • Sort by name, symbol, or spectra line count
  • Inspect individual spectra lines
  • Interactive spectrum visualization
Features
Read full description

Reference app for Strong Line Atomic Emission Spectra in the visible range of 380-740nm.  Can search by element name, symbol, or atomic number. Sort by name, symbol, or count of spectra lines. Drill down to an element and inspect the individual spectra lines.  Tap on the line to show it in the spectrum; tap on the spectrum to scroll to that line.

Screenshots

Atomic Spectra4 screens

Verdict

The call

The clearest difference is device support: Atomic Spectra at 4 against Radioactivity's 1. Radioactivity's advantage is price ($0.99 vs $1.99) and iOS requirement (12.0 vs 26.0). On 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

Radioactivity costs $0.99 and Atomic Spectra $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Radioactivity ships an update every 36 months, Atomic Spectra every 19 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

Scorecard3 real differences · 7 level
Radioactivity versus Atomic Spectra: the parameters behind the verdict, then further details
ParameterRadioactivityAtomic Spectra
Price$0.99 — better$1.99
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 36 monthsEvery 19 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPadiPhone, iPad, Mac, Apple TV — better
Requires iOS12.0 — better26.0
Further details — not scored
Size52 MB7 MB
Age rating4+4+
Developerwww.ajaxmediatech.comJim Haungs

In-app purchases

None

Radioactivity

No in-app purchases

None

Atomic Spectra

No in-app purchases

Questions

Is Radioactivity free?
Radioactivity costs $0.99, with no in-app purchases.
Is Atomic Spectra free?
Atomic Spectra costs $1.99, with no in-app purchases.
Do Radioactivity or Atomic Spectra have ads?
Neither Radioactivity nor Atomic Spectra shows ads.
Which is updated more often, Radioactivity or Atomic Spectra?
Radioactivity ships an update every 36 months, and Atomic Spectra every 19 months. Most recently, Radioactivity was updated on October 26, 2026 and Atomic Spectra on October 27, 2026.

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