Comparison

Decay calc vs Timecon

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

Head to head
About

Decay calc

This tool calculates the decay of radioactive isotopes over time, considering half-life for accurate activity predictions. It's useful in nuclear medicine, environmental monitoring, and radiation safety for handling and disposal of materials.

Highlights
  • Radioactive isotope decay calculation
  • Half-life integration
  • Activity prediction
  • Decay constant determination
  • Radiation dose calculation
Features
Read full description

Decay calc is a tool used to calculate the decay of radioactive isotopes over time. It takes into account the half-life of the isotope and allows for accurate predictions of the remaining activity of the isotope at any given time. Decay calc can be used in a variety of fields, such as nuclear medicine, environmental monitoring, and radiation safety. It can help determine the appropriate handling and disposal of radioactive materials and ensure the safety of individuals who may come into contact with them. In addition to calculating the remaining activity of the isotope, decay calc can also be used to determine the decay constant, which is a measure of the rate at which the isotope decays. This information can be used to calculate the radiation dose received by individuals who are exposed to the isotope. Overall, decay calc is a useful tool for anyone working with radioactive materials or interested in learning more about radioactivity and its effects. It provides accurate and reliable calculations that can help ensure safety and proper handling of radioactive materials.

About

Timecon

Features
Read full description

This app allows easy conversion of time units from nanoseconds to centuries. It supports seconds, minutes, hours, days, weeks, months, years, as well as milliseconds, microseconds, and nanoseconds. It also covers larger units like decades and centuries. Instantly calculate complex time conversions with ease. Designed for intuitive use, making it suitable for both beginners and professionals.

Screenshots

Decay calc3 screens
Timecon3 screens

Verdict

The call

The clearest difference is ads: Decay calc at none against Timecon's shown. Decay calc also leads on update cadence (every 3 months vs every 12 months). Timecon's advantage is iOS requirement (13.0 vs 15.2). On price, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Decay calc sells 1 one-off in-app purchase and Timecon sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Decay calc ships an update every 3 months, Timecon every 12 months. The most recent releases landed on September 21, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 7 level
Decay calc versus Timecon: the parameters behind the verdict, then further details
ParameterDecay calcTimecon
PriceFreeFree
Rating1.0 (1 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 3 months — betterEvery 12 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.213.0 — better
Further details — not scored
Size27 MB28 MB
Age rating17+4+
DeveloperAlexey Baranovkota tada

In-app purchases

1 purchases

Decay calc

One-time1
  • Radio calc$0.99
2 purchases

Timecon

Subscriptions2
  • Ad-free for 1 month7 Days trial$4.991 Month
  • Ad-free for 1 year14 Days trial$49.991 Year

Questions

Is Decay calc free?
Decay calc is free to download, with in-app purchases available.
Is Timecon free?
Timecon is free to download, with in-app purchases available.
Do Decay calc or Timecon have ads?
Timecon shows ads; Decay calc does not.
Which is updated more often, Decay calc or Timecon?
Decay calc ships an update every 3 months, and Timecon every 12 months. Most recently, Decay calc was updated on September 21, 2026 and Timecon on October 7, 2026.

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