Comparison

Lottery Probability Calculator vs Probability Sim

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

Head to head
About

Lottery Probability Calculator

Features
Read full description

It is an application that calculates the probability of winning by lottery or gacha. Enter the probability of winning and how many times you will draw, and you can calculate the probability of winning more than once. Probabilities can also be entered as percentages and fractions. ・Probability of winning the lottery Calculate the probability of winning from the appearance rate and the number of trials. You can calculate the probability of winning more than once when you draw 100 times. Since the probability of obtaining 0 to 4 times and 5 times or more is also displayed, you can also check the probability of obtaining multiple times. ・Number of times to win the lottery Calculate the number of trials required to draw a hit from the appearance rate and acquisition probability. You can calculate how many times you have to draw a lottery with a probability of winning 0.1% to get a probability of 80% or more. The number of times in 5% increments for each probability of winning is also displayed in a list, so you can easily check the number of times you need. ・Probability of getting everything When there are multiple prizes in gacha etc., calculate the probability of getting all of them by subtracting the specified number of times. You can easily check the probability of completing the lottery with 10 types of prizes when you draw 30 times.

About

Probability Sim

Features
Read full description

Probability Simulator 1T Trials is a powerful simulation app that lets you test probabilities to the extreme. Run up to 1 trillion trials and calculate probabilities as low as 1 in a trillion. Choose from decimal, percentage, or fraction notation. Simultaneously run multiple probability events for complex calculations. Perfect for statistics enthusiasts, mathematicians, and anyone interested in random trials. Sharpen your probability intuition and gain real insights from large-scale simulations.

Screenshots

Lottery Probability Calculator4 screens
Probability Sim2 screens

Verdict

The call

The clearest difference is in-app purchases: Lottery Probability Calculator at none against Probability Sim's 2. Lottery Probability Calculator also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads 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. Probability Sim sells 2 in-app purchases, starting at $4.99 per month. Lottery Probability Calculator asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 10 months. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

Scorecard2 real differences Β· 4 level
Lottery Probability Calculator versus Probability Sim: the parameters behind the verdict, then further details
ParameterLottery Probability CalculatorProbability Sim
PriceFreeFree
Update frequencyEvery 10 monthsEvery 10 months
AdsYesYes
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 β€” better15.0
Further details β€” not scored
Size17 MB29 MB
Age rating4+4+
DeveloperKouji Yamauchikota tada

In-app purchases

None

Lottery Probability Calculator

No in-app purchases

2 purchases

Probability Sim

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

Questions

Is Lottery Probability Calculator free?
Lottery Probability Calculator is free to download, with no in-app purchases.
Is Probability Sim free?
Probability Sim is free to download, with in-app purchases available.
Do Lottery Probability Calculator or Probability Sim have ads?
Both Lottery Probability Calculator and Probability Sim show ads.
Which is updated more often, Lottery Probability Calculator or Probability Sim?
Lottery Probability Calculator ships an update every 10 months, and Probability Sim every 10 months. Most recently, Lottery Probability Calculator was updated on October 27, 2026 and Probability Sim on October 30, 2026.

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