# Rand Omm vs Probability Sim

The clearest difference is in-app purchases: Rand Omm at none against Probability Sim's 2. Rand Omm also leads on ads (none vs shown) and update cadence (every 2 months vs every 10 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Probability Sim sells 2 in-app purchases, starting at $4.99 per month. Rand Omm asks for nothing beyond the download.

Rand Omm ships an update every 2 months, Probability Sim every 10 months. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Rand Omm | Probability Sim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rand-omm-random-numbers-app/id6739757292/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 10 months |
| Monetization | Free | — |
| Size | 25 MB | 29 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kamora](https://appshunter.io/developer/1470923790) | [kota tada](https://appshunter.io/developer/1658942612) |

## What reviewers say

### Rand Omm

[App page](https://appshunter.io/ios/app/rand-omm-random-numbers-app/id6739757292)

Effortlessly generate random numbers for any purpose, from games and raffles to everyday decisions. Features include custom ranges, spoken announcements, and ambient sound for an immersive experience. Simple, intuitive, and distraction-free.

**Highlights:** Custom number range (From/To), Tap or shake to generate, Optional spoken number announcements, Built-in ambient sound, Allow or disallow repeated numbers, Light and dark appearance

**In-app purchases:** none


### Probability Sim

[App page](https://appshunter.io/ios/app/probability-sim-trillion/id6743378063)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad-free for 1 month | $4.99 | per month |
| Ad-free for 1 year | $49.99 | per year |


## Frequently asked questions

### Is Rand Omm free?

Rand Omm 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 Rand Omm or Probability Sim have ads?

Probability Sim shows ads; Rand Omm does not.

### Which is updated more often, Rand Omm or Probability Sim?

Rand Omm ships an update every 2 months, and Probability Sim every 10 months. Most recently, Rand Omm was updated on October 24, 2026 and Probability Sim on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*