Comparison

卓信签 vs Focus.AI

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

卓信签

Features
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卓信签是一款安全便捷的移动安全认证产品,以密码技术为核心,融合密钥分割、数字签名等技术,结合数字证书为用户提供移动终端的可信身份,主要功能包括身份认证、数据签名、文档签章、数据查询、消息提醒,用户通过手机即可完成系统登录授权和业务签名。

About

Focus.AI

Features
Read full description

Focus.AI is a professional focus training and time management app that helps users build scientific focus habits and improve work and learning efficiency. Key Features: • Focus Timer: Focus training based on the Pomodoro Technique • Task Management: Smart task categorization and priority setting • Data Analytics: Detailed focus data analysis and visualization • Habit Building: Scientific habit tracking and motivation system • Meditation Guide: Built-in meditation exercises and relaxation techniques Perfect for: - Students: Improve learning focus and efficiency - Professionals: Optimize work time management - Freelancers: Establish regular work rhythms - Meditation enthusiasts: Assist meditation practice With Focus.AI, make every moment of focus more valuable and time management more efficient! Important Medical Disclaimer: The ADHD tendency analysis provided by this app is based solely on training data and is not a medical diagnosis. If you have any health concerns, please consult a qualified doctor or mental health professional. All medical decisions should be based on professional medical advice. Sources of Medical Information: • American Psychiatric Association (APA) - DSM-5 diagnostic criteria • National Institute of Mental Health (NIMH) - ADHD research • Centers for Disease Control and Prevention (CDC) - ADHD guidelines • Journal of Attention Disorders - academic research Note: This app is not a medical device and cannot replace professional medical advice, diagnosis, or treatment. Terms of Use : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

卓信签4 screens
Focus.AI4 screens

Verdict

The call

The clearest difference is in-app purchases: 卓信签 at none against Focus.AI's 3. 卓信签 also leads on ads (none vs shown) and iOS requirement (10.0 vs 16). Focus.AI's advantage is update cadence (every 3 days vs every 3 months). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Focus.AI sells 3 in-app purchases, starting at $1.99 per month. 卓信签 asks for nothing beyond the download.

UpkeepUpdate frequency

卓信签 ships an update every 3 months, Focus.AI every 3 days. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

Scorecard4 real differences · 2 level
卓信签 versus Focus.AI: the parameters behind the verdict, then further details
Parameter卓信签Focus.AI
PriceFreeFree
Update frequencyEvery 3 monthsEvery 3 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better16
Further details — not scored
Size11 MB32 MB
Age rating17+4+
Developer山东卓码信息技术有限公司永生 刘

In-app purchases

None

卓信签

No in-app purchases

3 purchases

Focus.AI

Subscriptions3
  • Monthly Plan$1.991 Month
  • Quarterly Plan$5.993 Months
  • Annual Plan$17.991 Year

Questions

Is 卓信签 free?
卓信签 is free to download, with no in-app purchases.
Is Focus.AI free?
Focus.AI is free to download, with in-app purchases available.
Do 卓信签 or Focus.AI have ads?
Focus.AI shows ads; 卓信签 does not.
Which is updated more often, 卓信签 or Focus.AI?
卓信签 ships an update every 3 months, and Focus.AI every 3 days. Most recently, 卓信签 was updated on November 3, 2026 and Focus.AI on October 28, 2026.

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