Hark Pro vs KnifeKeep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Hark Pro
This app acts as a personal operating system, proactively managing tasks across the web and your life. It can handle reservations, orders, scheduling, and project management by integrating with various services and websites.
- Proactive task management
- Web service integration
- Automated reservations and orders
- Schedule and calendar management
- Project tracking
- Customizable mini-apps (Panels)
- Secure login management
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Hark Pro is an operating system for your life, built to think ahead, and help you with real, practical things. By combining advanced memory and the ability to use a computer in the cloud, Hark understands the context of your life and can take care of things across the web. No agents or subscriptions required. Hark can log in to OpenTable and make a reservation for you. But it’s also smart enough to reference your calendar for an open time, recall your favorite spots for openings, note your friend’s food allergies in the reservation, and even create a button to reserve an Uber to get there that night. Use Hark to order groceries. Return products. Manage your schedule. Build mini apps. And track complicated projects, integrating Google Docs and Slack messages, mindlessly. Hark is a simple chat app with powerful capabilities - freeing your time to spend away from screens. Proactive thinking Hark looks ahead. Book a movie on Hark, and Hark won’t just buy the ticket and add it to your calendar. It’ll scope the parking situation ahead of time, and offer to reserve you a spot before they fill up. Hark thinks creatively to remove friction across your life. Use the web with Handoff Just type “deliver me pizza” to hand off the task to Hark. It will hunt for the best local pizzarias, go on their websites, read their menus, and order you one for delivery via DoorDash (with your consent and favorite toppings, of course). Hark securely manages your logins to hundreds of sites including Target, Amazon, and LinkedIn so it can handle tasks from start to finish. Hark can also fill out web forms for you, writing multiple services to get quotes on a move or renovation. It can dig through webpages to find dentists who actually take your insurance - and email them for you to ask if it's unclear. It can plan your new wardrobe, then present it on a custom website built just for you. Manage your personal and professional life With Email and Slack integration, Hark can keep track of your most important messages, build your daily schedule, balance your calendar, and summarize dozens of discussions across your workplace into just the things that you need to know. Follow long term tasks with Projects Hark can manage your life in one, long-running chat. But sometimes you want to start with a blank slate. Projects are dedicated threads for longer term work. They focus a single topic, and related files, in one place that you can visit again and again over time. Build your own Panels Never learn to code. Hark can generate tiny bits of software called Panels - ranging from exercise trackers to media players - that live right inside the Hark app. All you do is prompt. You can even ask your Panels questions to dig deeper into their data, unlocking even more from services you already use like Strava, Spotify, and Venmo. Solve it with a button press Notifications give you work. Hark’s Action Buttons provide solutions. Hark’s one-line summaries highlight the most important things you need to do next. Just press a button to “pay” a bill, “RSVP” to an event, or “review” an insurance claim. Do everything else you expect an assistant to do Researching questions. Analyzing PDFs. Yes, even telling you the weather. Hark offers all of the same baseline services offered by other leading AI labs, too. Security and privacy Your data is your own. Hark will never sell your data or serve you ads. We also never see your most private information, like stored passwords or credit card numbers, which are always encrypted in storage and in transit. Hark does real work • Order dinner and groceries • Book cheap flights and hotels • Spot subscriptions before they renew • Schedule automatic tasks • Build websites, spreadsheets, and slide decks Terms of Service: https://www.hark.com/terms Privacy Policy: https://www.hark.com/privacy-policy © 2026 Hark
KnifeKeep
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Keep your knives at their sharpest. "When did I last sharpen this?" "I pulled it out and it had rusted." Your knives deserve better — let KnifeKeep look after their sharpening and rust care. ■ Sharpening timing by steel Stainless, carbon steel, Damascus, ceramic — each holds an edge differently. KnifeKeep estimates the sharpening timing and gently reminds you as it approaches. ■ Spot the ones about to rust Carbon steel and Damascus rust when left unused or wet. From the last day used, see "Cared for" or "May rust" — a nudge to wipe it or add oil. ■ Your collection, in photos Photograph each knife and the subject is cut out automatically. Your personal collection lined up beautifully. ■ Three-stage sharpening reminders Ahead of time (2 weeks, a few days) → on the day → and gently every day after until it's done. A dull edge is unsafe — never miss it. ■ Tips for cooks From sharpening angle and whetstone grit to no-dishwasher and choosing a cutting board — 24 tips and a mascot make care more fun. ■ Widget support See knives due for sharpening and their status at a glance on your Home Screen. [Free] • Register up to 3 knives • Sharpening reminders [Premium] • Unlimited knives • Group by storage • Care log (type, whetstone, notes) • No ads One-time $20 or $1.49/week (no free trial). Subscriptions auto-renew and are billed to your Apple ID unless canceled at least 24 hours before the period ends. Cancel anytime in Settings. Sharpening cycles are general guides based on the steel. Adjust to how often you use it and your preference. ■ LINKS • Support: https://tsuzukit.com/contact/ • Terms of Service: https://tsuzukit.com/legal/terms-of-service.html • Privacy Policy: https://tsuzukit.com/legal/privacy-policy.html
Screenshots
Verdict
The clearest difference is ads: Hark Pro at none against KnifeKeep's shown. Hark Pro also leads on update cadence (every 2 days vs every 3 months) and chart position (#131 vs unranked). On price, in-app purchases, device support and iOS requirement 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. Hark Pro sells 3 in-app purchases, starting at $26.00 per month and KnifeKeep sells 2 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Hark Pro ships an update every 2 days, KnifeKeep every 3 months. The most recent releases landed on October 25, 2026 and October 8, 2026 respectively.
| Parameter | Hark Pro | KnifeKeep |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1.7K ratings) — better | — |
| Positive reviews | 92.5% of reviews | — |
| Number of ratings | 1.7K — better | — |
| Update frequency | Every 2 days — better | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Best chart rank | #131 — better | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 99 MB | 7 MB |
| Age rating | 17+ | 17+ |
| Developer | Hark Labs Inc. | Ryo Tsudukihashi |
In-app purchases
Hark Pro
- Hark Pro²$26.001 Month
- Hark Pro³$129.991 Month
- Hark Pro⁴$200.001 Month
KnifeKeep
- Premium (Weekly)$0.997 Days
- Premium (Lifetime)$19.99









