Comparison

Trillion vs RandN

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

Head to head

Trillion

Probability Calculator with...

Fast, simple number picker

Free

🔧 Utilities

No ratingsView app →

About

Trillion

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.

About

RandN

Features

Read full description

RandN is a small, focused iPhone app for picking a random number in a selected range. Why it is useful: - No ads, banners, tracking, or forced videos. - Choose From and To with smooth wheel pickers instead of typing numbers. - Set a higher maximum in Settings when you need larger ranges. - The result updates automatically when either bound changes. - RandN remembers your selected range and maximum between sessions. - A fresh random result is generated each time the app launches. RandN supports positive integer ranges from 1 up to a configurable maximum of 100. The experience stays deliberately simple: open the app, choose the range, get the number.

Screenshots

Trillion2 screens

RandN4 screens

Verdict

The call

The clearest difference is in-app purchases: RandN at none against Trillion's 2. RandN also leads on ads (none vs shown) and update cadence (every 4 weeks vs every 12 months). Trillion's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.0). On price 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. Trillion sells 2 in-app purchases, starting at $4.99 per month. RandN asks for nothing beyond the download.

UpkeepUpdate frequency

Trillion ships an update every 12 months, RandN every 4 weeks. The most recent releases landed on October 5, 2026 and October 2, 2026 respectively.

Scorecard5 real differences · 1 level

Trillion versus RandN: the parameters behind the verdict, then further details
Parameter	Trillion	RandN
Price	Free	Free
Update frequency	Every 12 months	Every 4 weeks — better
Ads	Yes	No — better
In-app purchases	Yes	No — better
Devices	iPhone, iPad, iPod — better	iPhone
Requires iOS	13.0 — better	16.0
Further details — not scored
Size	29 MB	2 MB
Age rating	4+	4+
Developer	kota tada	Dmitry Kozlov

In-app purchases

2 purchases

Trillion

Subscriptions2

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

None

RandN

No in-app purchases

Questions

Is Trillion free?

Trillion is free to download, with in-app purchases available.

Is RandN free?

RandN is free to download, with no in-app purchases.

Do Trillion or RandN have ads?

Trillion shows ads; RandN does not.

Which is updated more often, Trillion or RandN?

Trillion ships an update every 12 months, and RandN every 4 weeks. Most recently, Trillion was updated on October 5, 2026 and RandN on October 2, 2026.