# Comet vs ECHO Survival AI

The clearest difference is update cadence: Comet at every 8 days against ECHO Survival AI's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Comet sells 3 in-app purchases, starting at $20.00 per month and ECHO Survival AI sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Comet ships an update every 8 days, ECHO Survival AI every 3 months. The most recent releases landed on November 12, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Comet | ECHO Survival AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (7.8K ratings)](https://appshunter.io/ios/app/comet-ai-browser-and-assistant/id6748622471/reviews)** | — |
| Number of ratings | **7.8K** | — |
| Positive reviews | 65.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 291 MB | 97 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Perplexity AI, Inc.](https://appshunter.io/developer/1668000336) | [ehsan azish](https://appshunter.io/developer/1622575303) |

## What reviewers say

### Comet

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

This AI-powered browser serves as a personal assistant, enhancing focus and streamlining workflows. It offers unified AI search, instant context, and automation across websites for tasks like summarizing, shopping, scheduling, and research.

**Highlights:** Unified AI search, Instant context and automation, Summarize, shop, schedule, research, Personalized workflow adaptation, Tab and inspiration management

**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 |


### ECHO Survival AI

[App page](https://appshunter.io/ios/app/echo-survival-ai/id6756616533)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock offline use forever | $12.99 | one-time |
| Full version | $12.99 | one-time |


## Frequently asked questions

### Is Comet free?

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

### Is ECHO Survival AI free?

ECHO Survival AI is free to download, with in-app purchases available.

### Do Comet or ECHO Survival AI have ads?

Neither Comet nor ECHO Survival AI shows ads.

### Which is updated more often, Comet or ECHO Survival AI?

Comet ships an update every 8 days, and ECHO Survival AI every 3 months. Most recently, Comet was updated on November 12, 2026 and ECHO Survival AI on November 5, 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.*