Probability vs Comet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Probability
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.
- Probability assessment
- Decision-making improvement
- Problem-solving formulas
- Personalized notes
- Dice and coin toss simulations
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Probability is the key to making decisions under uncertainty, and with our app, you can improve your ability to assess probabilities and make better decisions in life. Our app includes different formulas to help you solve problems and make decisions, as well as the option to take references and write down your own notes about probability. Plus, you can have fun with probability by tossing dice and coins.
Comet
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.
- Unified AI search
- Instant context and automation
- Summarize, shop, schedule, research
- Personalized AI assistant
- Tab and inspiration organization
- Workflow streamlining
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Comet is an AI-powered browser that acts as a personal assistant and thinking partner. Boost your focus, streamline your workflow, and turn curiosity into momentum. · Unified AI search, instant context, and automation across every site. Summarize, shop, schedule, and research—directly in the browser. · Enjoy the web and let the AI assistant handle your chores · Do everything on your to-do list faster with Comet · Comet adapts to how you think and work, learning your habits to keep you organized. Never lose track of tabs or inspiration. Terms of Service: https://www.perplexity.ai/tos Privacy Policy: https://www.perplexity.ai/privacy
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Probability | Comet |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 4.8 (7.8K ratings) — better |
| Positive reviews | 0.0% of reviews | 65.1% of reviews — better |
| Number of ratings | 1 | 7.8K — better |
| Update frequency | Every 10 days | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 14.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 166 MB | 285 MB |
| Age rating | 4+ | 17+ |
| Developer | Man Hung Sun | Perplexity AI, Inc. |
Customer experience
Probability
Comet
In-app purchases
Probability
- Upgrade$0.99
Comet
- Perplexity Pro$20.001 Month
- Perplexity Pro$200.001 Year
- Perplexity Max$200.001 Month
