K vs Sectra
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
K
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骨盤底筋トレーニング(ケーゲル体操)をサポートするこのアプリは、「K-GEL CHECKER」を活用して効果的な筋力アップをサポートします。 正しい姿勢や力の入れ方を学び、日々の取り組みを記録。測定結果を通じて成果を確認できるので、モチベーション維持にも役立ちます。 アプリ内のお役立ち情報や測定方法の指示も参考に、継続的なトレーニングで健康的な骨盤底筋を目指しましょう。
Sectra
Safely log and analyze your intimate activities, including frequency, duration, and contraception use. Understand your personal health patterns with detailed statistics and a calendar view. Secure your private data with biometric locks and no sign-up required.
- One-tap activity logging
- Partner profiles with memos
- Detailed statistics and trends
- Calendar view of activities
- Apple Health integration
- Biometric and passcode security
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Safely record and manage your private activities. Sectra is a simple tracking app for recording your intimate moments and private activities — dates, frequency, duration, and more. In a completely private space, understand your patterns and rhythms to support your personal health management. ■ Key Features ● One-Tap Recording Just pick a date and tap. Quickly log type, count, duration, and protection use. ● Partner Management Set photos, memos, and tags for each partner. Look back on frequency and patterns. ● Detailed Statistics Monthly trends, weekday heatmaps, time-of-day distribution, streaks, duration analysis — visualize your data from every angle. ● Calendar View See your monthly activity at a glance. ● Apple Health Integration Sync records to the Apple Health app. Toggle on/off per activity. ■ Security ● Lock with Face ID / Touch ID ● 4-digit passcode option (locks for 15 min after 5 failed attempts) ● Background privacy screen (content hidden in app switcher) ● No sign-up required. Open the app and start right away. ■ Recommended For ・Anyone who wants to understand their activity patterns ・Those who want to keep a life log with their partner ・Those managing personal wellness through self-tracking ■ Privacy Your data is strictly managed and never shared with third parties without your consent. *This app is designed for personal health and wellness purposes and does not include any content-sharing features.
Screenshots
Verdict
The clearest difference is update cadence: Sectra at every 2 weeks against K's every 6 months. On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.
K ships an update every 6 months, Sectra every 2 weeks. The most recent releases landed on October 13, 2026 and October 24, 2026 respectively.
| Parameter | K | Sectra |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.6 (7 ratings) — better |
| Number of ratings | — | 7 — better |
| Update frequency | Every 6 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone | iPhone |
| Requires iOS | 16.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 1 MB | 14 MB |
| Age rating | 17+ | 17+ |
| Developer | TENGA Healthcare Inc. | Akira Ohnishi |
In-app purchases
K
No in-app purchases
Sectra
No in-app purchases









