KnifeKeep: Blade Care
Ryo Tsudukihashi Lifestyle iPhoneiPadiPod touch
KnifeKeep: Blade Care is a free Lifestyle app for iPhone and iPad by Ryo Tsudukihashi. Requires iOS 17.0. Updated September 24, 2026.
- Price
- Free
- on the App Store
- Size
- 7 MB
- Age 17+
- Updated
- Sep 24
- 2026 · v1.0.1
Screenshots
About KnifeKeep: Blade Care
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
What’s new
Version 1.0.1 · Updated September 24, 2026
Rebuilt the first-run walkthrough so you work up through the grits, from coarse stone to finishing. The premium screen now uses the cross-section of a blade.
App privacy
The developer, Ryo Tsudukihashi, reported these privacy practices to Apple.
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Usage Data: Advertising Data
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Usage Data: Advertising Data
Used for: Third-Party Advertising
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| KnifeKeep: Blade Care | – | Free | September 24, 2026 | |
| Forge Sharpening Log | – | Free | May 26, 2026 | Compare |
| スマートDOサポート | – | Free | Dec 4, 2024 | Compare |
| スマートDOホーム | – | Free | Oct 21, 2026 | Compare |
| Card3 - Digital Business Card | 5.0 / 5 (4) | Free | Jan 5, 2026 | Compare |
| 珈琲問屋公式アプリ | – | Free | Oct 13, 2026 | Compare |
| HairBoost: Buzz Cut Filter | 4.2 / 5 (37) | Free | Sep 12, 2026 | Compare |