# Probability vs Comet

The clearest difference is review sentiment: Comet at 65% against Probability's 0%. Comet also leads on rating (4.8 vs 1.0) and ratings volume (7.8K vs 1). Probability's advantage is iOS requirement (14.0 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Probability sells 1 one-off in-app purchase and Comet sells 3 in-app purchases, starting at $20.00 per month. Whichever you choose, the download price is not the number that matters.

Comet holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: Comet has 7.8K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Probability's written reviews are positive against 65% of Comet's.

Probability ships an update every 10 days, Comet weekly. The most recent releases landed on October 5, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Probability | Comet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/probability-easy-and-practical/id1625073969/reviews) | **[4.8 (7.8K ratings)](https://appshunter.io/ios/app/comet-ai-browser-and-assistant/id6748622471/reviews)** |
| Number of ratings | 1 | **7.8K** |
| Positive reviews | 0.0% of reviews | **65.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 166 MB | 285 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Man Hung Sun](https://appshunter.io/developer/1471605573) | [Perplexity AI, Inc.](https://appshunter.io/developer/1668000336) |

## What reviewers say

### Probability

[App page](https://appshunter.io/ios/app/probability-easy-and-practical/id1625073969)

Enhance your decision-making skills by learning to assess probabilities with this app. It offers formulas for problem-solving, note-taking capabilities, and interactive tools like dice and coin tosses for practical learning.

**Highlights:** Probability assessment, Decision-making improvement, Problem-solving formulas, Personalized notes, Dice and coin toss simulations

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade | $0.99 | one-time |


### Comet

[App page](https://appshunter.io/ios/app/comet-ai-browser-and-assistant/id6748622471)

This AI-powered browser acts as a personal assistant, streamlining workflows and boosting focus. It offers unified AI search, instant context, and automation across websites for tasks like summarizing, shopping, and research. The assistant learns your habits to keep you organized and prevent lost tabs or inspiration.

**Highlights:** Unified AI search, Instant context and automation, Summarize, shop, schedule, research, Personalized AI assistant, Tab and inspiration organization, Workflow streamlining

**Features:** Apple Wallet

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Perplexity Pro | $20.00 | per month |
| Perplexity Pro | $200.00 | per year |
| Perplexity Max | $200.00 | per month |


## Frequently asked questions

### Is Probability free?

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

### Is Comet free?

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

### Which has better reviews, Probability or Comet?

Comet is rated higher. Probability averages 1.0 out of 5 from 1 ratings, while Comet averages 4.8 from 7.8K ratings.

### Do Probability or Comet have ads?

Neither Probability nor Comet shows ads.

### Which is updated more often, Probability or Comet?

Probability ships an update every 10 days, and Comet weekly. Most recently, Probability was updated on October 5, 2026 and Comet on October 19, 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.*