4K Life vs Comet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
4K Life
Visualize your remaining lifespan in weeks and track your progress towards life goals. This app encourages you to make the most of your time, with a countdown of your remaining weeks and a visual representation of your life's progress.
- Lifespan visualization in weeks
- Goal achievement tracking
- Urgency-driven progress motivation
- Countdown timer for remaining weeks
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How many weeks you got left? Did you achieve all of your goals? Hurry up, your boxes are filling up!
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 rating: Comet at 4.7 against 4K Life's 3.5. Comet also leads on ads (none vs shown) and ratings volume (7.8K vs 20). 4K Life's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 18.0). On price, in-app purchases and monetization model 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. 4K Life 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, 4.7 against 3.5. That said, the two scores are not equally well evidenced: Comet has 7.8K ratings behind it against 20, so its average is the more settled of the two. Written reviews point the same way: 50% of 4K Life's written reviews are positive against 65% of Comet's.
4K Life ships an update monthly, Comet weekly. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.
| Parameter | 4K Life | Comet |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (20 ratings) | 4.7 (7.8K ratings) — better |
| Positive reviews | 50.0% of reviews | 65.2% of reviews — better |
| Number of ratings | 20 | 7.8K — better |
| Update frequency | Monthly | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 20 MB | 285 MB |
| Age rating | 4+ | 17+ |
| Developer | MitotiM | Perplexity AI, Inc. |
Customer experience
4K Life
Comet
In-app purchases
4K Life
- Remove ad$3.99
Comet
- Perplexity Pro$20.001 Month
- Perplexity Pro$200.001 Year
- Perplexity Max$200.001 Month
