# Comet vs Mark Bookmark

The clearest difference is in-app purchases: Mark Bookmark at none against Comet's 3. Mark Bookmark also leads on review sentiment (100% vs 65%) and rating (5.0 vs 4.7). Comet's advantage is ratings volume (7.8K vs 2). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Comet sells 3 in-app purchases, starting at $20.00 per month. Mark Bookmark asks for nothing beyond the download.

Mark Bookmark holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Comet has 7.8K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 65% of Comet's written reviews are positive against 100% of Mark Bookmark's.

Comet ships an update weekly, Mark Bookmark every 4 days. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Comet | Mark Bookmark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (7.8K ratings)](https://appshunter.io/ios/app/comet-ai-browser-and-assistant/id6748622471/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/mark-bookmark/id6756251684/reviews)** |
| Number of ratings | **7.8K** | 2 |
| Positive reviews | 65.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 285 MB | 121 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Perplexity AI, Inc.](https://appshunter.io/developer/1668000336) | [Mark Inc](https://appshunter.io/developer/1859545872) |

## What reviewers say

### 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 |


### Mark Bookmark

[App page](https://appshunter.io/ios/app/mark-bookmark/id6756251684)

Capture physical notes and ideas from books and printouts, turning them into organized insights. Automatically catalog your reading and search for specific passages. Chat with your highlights to trace ideas across different sources.

**Highlights:** Scan and save passages with high accuracy, Record voice notes without unlocking device, Automatic cataloging by book ISBN, Searchable library of captured content, AI chat with highlights and annotations, Integrations with Notion and Readwise, Offline capture and sync

**In-app purchases:** none


## Frequently asked questions

### Is Comet free?

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

### Is Mark Bookmark free?

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

### Which has better reviews, Comet or Mark Bookmark?

Mark Bookmark is rated higher. Comet averages 4.7 out of 5 from 7.8K ratings, while Mark Bookmark averages 5.0 from 2 ratings.

### Do Comet or Mark Bookmark have ads?

Neither Comet nor Mark Bookmark shows ads.

### Which is updated more often, Comet or Mark Bookmark?

Comet ships an update weekly, and Mark Bookmark every 4 days. Most recently, Comet was updated on October 26, 2026 and Mark Bookmark on October 25, 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.*