Comparison

Docmark vs 数数日子

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

Head to head
About

Docmark

This app helps you manage and secure your credentials with custom watermarks. It prioritizes privacy with offline processing and optional iCloud synchronization. Organize, categorize, and batch edit your documents for enhanced security.

Highlights
  • Offline credential processing
  • Customizable watermarks
  • Batch editing and sorting
  • Local and iCloud storage
  • Organize and categorize credentials
Features
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Docmark - Your Privacy Credential Management Assistant Completely offline, local processing, supports classified management of your credentials. By default, no network access permission is requested. Only after enabling iCloud synchronization will network permission be requested, due to the need to communicate with iCloud servers when using Apple's official iCloud development library 'CloudKit'. • Easily organize and categorize your various credentials, supports multiple credential files within one storage item, and individually add watermarks to specific credentials. • Customize watermark styles, including text size, density, transparency, and rotation angle • Support batch editing and sorting of multiple credential images • Support local storage and iCloud cloud synchronization for more secure data • Image processing is completely offline, protecting your privacy and security • iCloud synchronization uses Apple's official CloudKit to protect privacy and security.

About

数数日子

Features
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核心功能 ​纪念日管家:从恋爱100天到猫咪绝育3周年,所有需要假装记得的日子,我们都帮你精确到天 ​倒计时狂魔:距离发工资还有3天?春节假期倒计时180天?比老板画的饼更实在的时间刻度尺 ​物理级隐私:不联网、不传数据、不要权限——防闺蜜防老板防大数据的终极三防手机保镖 用户痛点解决方案 ​场景1:当对象问"今天是什么日子",你不再需要靠"爱你的每一天都是纪念日"这种土味情话蒙混过关 ​场景2:终于能在同学聚会准确说出"我们上次见面是372天前",达成社交圈时间管理の神成就 ​场景3:手机里终于有个APP不会偷偷问"是否允许访问相册通讯录位置信息",像极了爱情里给足安全感的理想型 产品宣言 我们是一款"三无产品": 无广告(连「猜你喜欢」的试探都没有) 无权限(摄像头麦克风?我们比ATM机更守身如玉) 无联网(服务器是什么?能吃吗?) 正如开发者宣言:「如果哪天这个APP开始要权限了,请立刻卸载并拨打110举报我被绑架了」 技术亮点 ​断网运行:采用量子纠缠原理,保证数据只存在于你的手机和你的大脑之间 ​极简设计:操作简单到连你家猫都能学会,毕竟我们砍掉了所有「点击这里看广告解锁特效」的迷惑功能 ​隐私堡垒:数据加密技术荣获「薛定谔的保险箱」认证——除非你主动打开,否则连开发者都不知道里面有什么

Screenshots

Docmark4 screens
数数日子3 screens

Verdict

The call

The clearest difference is in-app purchases: 数数日子 at none against Docmark's 1. 数数日子 also leads on update cadence (daily vs monthly). Docmark's advantage is iOS requirement (13.0 vs 15.6). On price, ads 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. Docmark sells 1 one-off in-app purchase. 数数日子 asks for nothing beyond the download.

UpkeepUpdate frequency

Docmark ships an update monthly, 数数日子 daily. Both last shipped on October 30, 2026.

Scorecard3 real differences · 5 level
Docmark versus 数数日子: the parameters behind the verdict, then further details
ParameterDocmark数数日子
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyMonthlyDaily — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size46 MB3 MB
Age rating4+4+
DeveloperCometDust Technology (Guangzhou) Co., Ltd莹 李

In-app purchases

1 purchases

Docmark

One-time1
  • Pro$2.99
None

数数日子

No in-app purchases

Questions

Is Docmark free?
Docmark is free to download, with in-app purchases available.
Is 数数日子 free?
数数日子 is free to download, with no in-app purchases.
Do Docmark or 数数日子 have ads?
Neither Docmark nor 数数日子 shows ads.
Which is updated more often, Docmark or 数数日子?
Docmark ships an update monthly, and 数数日子 daily. Most recently, Docmark was updated on October 30, 2026 and 数数日子 on October 30, 2026.

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