Comparison

水印大师 vs RootKey

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

Head to head
About

水印大师

Easily extract videos and images from various links. Add custom watermarks, stickers, and text to your photos. Access a vast library of high-definition video materials for your creative projects.

Highlights
  • Extract videos from links
  • Batch save images from links
  • Add custom watermarks to images
  • Extensive video material library
  • AI image repair
  • Format conversion
Features
Read full description

【提取视频】支持在线解析提取视频,高清素材一键获取解析,方便快捷。 【链接存图】 支持多类型链接在线解析批量存图,一键搞定。 【图片水印】 图片添加功能为你的创作带来更多可能。可在现有图片基础上添加各种元素,如贴纸、图案、文字等。操作简便,只需选择要添加的内容并放置在合适位置。丰富的素材库满足不同风格需求,让你的图片更具个性与创意 【链接提取图集】 链接提取图片功能便捷实用。只需输入图片所在的链接地址,即可快速提取出其中的图片。无论是网页上的精美图像,还是特定资源链接中的图片,都能轻松获取。为用户节省查找和下载图片的时间,方便进行图片的保存和进一步处理。 【素材圈】 视频素材大全 是一个素材资源丰富的宝库。它拥有海量的高清视频素材,涵盖风景、人物、动画、特效等各种类型 【VIP会员服务说明】 1. 订阅服务与价格 非续期订阅: 终身会员:¥288(一次性付费,永久有效) 自动续期订阅: 连续包周:¥58/周 连续包月:¥128/月 连续包年:¥188/年 2. 自动续费规则 扣费说明: 您的苹果 iTunes 账户会在订阅期到期前 24 小时内进行扣费。扣费成功后,订阅周期将自动顺延一个周期。 续订确认: 订阅将按照您所选套餐的当前价格自动续订,除非您在当前订阅期结束前至少 24 小时取消自动续费。 3. 取消与管理订阅 您可以随时在手机设置中手动关闭自动续费服务。 操作路径: 打开苹果手机“设置” -> 进入“iTunes Store 与 App Store” -> 点击“Apple ID” -> 选择“查看 Apple ID” -> 进入“账户设置”页面 -> 点击“订阅” -> 选择 [水印大师] 取消订阅即可。 隐私协议 https://watertbsydsa.yunxiaoguo.cn/txt/privacyPolicy.html 订阅协议 https://watertbsydsa.yunxiaoguo.cn/txt/RenewalAgreement.html 服务条款 (EULA) https://watertbsydsa.yunxiaoguo.cn/txt/PaymentService.html

About

RootKey

Securely manage your passwords and sensitive data with end-to-end encryption. This app offers offline access, cross-device syncing via your chosen cloud service, and a one-time purchase model with free updates. It also integrates AI coding assistants with granular access controls.

Highlights
  • End-to-end encryption
  • Offline access
  • Cross-device syncing
  • One-time purchase
  • AI coding assistant integration
  • Password generator
  • Security checks
Features
Read full description

Your passwords are only ever unlocked on your own devices. Your vault is encrypted on your iPhone and computer; our servers hold no copy of it and cannot see inside. Buy the current major version once, get free updates within it, and never create an account. YOUR VAULT STAYS WITH YOU · Encryption and decryption happen on your device; your master password is never stored or uploaded · Sync across devices through a place you choose: WebDAV, iCloud Drive, Dropbox, a local folder on your computer, or another device on the same Wi-Fi. Only the encrypted vault is transferred · Works offline for viewing, copying and adding entries BUY ONCE, NOT A SUBSCRIPTION · Pay once, use the current major version with free updates · Buy a lifetime license for 1, 3 or 5 devices in the app; owners can add devices by paying the difference · No account needed; use Restore Purchase on a new iPhone SEE WHAT AI READ Connect an AI coding assistant on your computer and decide item by item what it may read. Every read is logged: which assistant, which item, and when. After sync, the AI Access center on your iPhone shows it all, and you can revoke everything in one tap. Each item can be set to "use but can't see": the AI can use it without seeing the secret itself, and newly shared items default to this. While your computer is locked, AI requests go to your iPhone, where you can allow just that one, allow for a set time, or deny. Items you have not shared stay invisible to AI. MOVE FROM APPLE PASSWORDS In Passwords, choose Export Data to Another App → RootKey. Passwords, passkeys and verification codes are handed over by the system directly, with no server in between. SIRI AND SHORTCUTS Say "Search RootKey" or "Lock RootKey" to jump straight there. Shortcuts only open the app and never read out or return a password; you still unlock as usual. WHAT YOU GET · 19 item types: logins, credit cards, bank accounts, identity documents, Wi-Fi, servers, SSH keys and more, plus custom fields · Photograph the label on your router and the Wi-Fi name and password fill in · Keep work and personal items in separate vaults; a vault deleted by mistake can be restored from the Trash · Strong password generator with adjustable length and character sets · One-time codes (TOTP) right next to the password, filled into verification code fields automatically · Strong passwords generated and saved when you sign up; insert server addresses, tokens and card numbers into any text field · System-level autofill and passkeys · Security check: weak, reused and breached passwords, missing 2FA, expiring cards and documents · Passwords copied to the clipboard clear themselves automatically FORGOT YOUR MASTER PASSWORD? THERE IS A WAY BACK Creating a vault generates a recovery key and walks you through printing it. If you forget your master password, the key resets it without losing data. If both are lost, nobody can open the vault, including us, so keep it safe. OPEN SOURCE CRYPTO CORE Every line that touches your passwords and keys is published at github.com/bitbeam-cn/rootkey-crypto (MIT / Apache-2.0) with test vectors anyone can check. Security depends on your master password, not on the code being secret. TRIAL Try every feature free for 14 days, no sign-up. When it ends you can still view, copy and export everything; only adding and editing are limited. Support: hi@bitbeam.cn Website: rootkey.bitbeam.cn

Screenshots

水印大师4 screens
RootKey4 screens

Verdict

The call

水印大师 and RootKey both sit at 5.0 stars, but that hides the real split: 100% of RootKey's written reviews are positive against 44% of 水印大师's. RootKey also leads on update cadence (daily vs fortnightly). 水印大师's advantage is ratings volume (13 vs 1) and monetization model (free with in-app purchases vs paid). On price, rating, ads and in-app purchases 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. 水印大师 sells 10 in-app purchases, starting at $3.99 per 7 days and RootKey sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for 水印大师 against 5.0 for RootKey. That said, the two scores are not equally well evidenced: 水印大师 has 13 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 44% of 水印大师's written reviews are positive against 100% of RootKey's.

UpkeepUpdate frequency

水印大师 ships an update fortnightly, RootKey daily. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 5 level
水印大师 versus RootKey: the parameters behind the verdict, then further details
Parameter水印大师RootKey
PriceFreeFree
Rating5.0 (13 ratings)5.0 (1 ratings)
Positive reviews43.8% of reviews100.0% of reviews — better
Number of ratings13 — better1
Update frequencyFortnightlyDaily — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.0 — better15.1
Further details — not scored
Size53 MB90 MB
Age rating4+4+
DeveloperTanbei InformationJiangsu Xinghui Shuzhi Technology Co., Ltd

Customer experience

水印大师

All ratings12 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews32 reviews
Positive43.8%
Neutral6.3%
Negative50.0%

RootKey

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

10 purchases

水印大师

Subscriptions5
  • 周会员-3天免费试用3 Days trial$3.997 Days
  • 包周使用$3.997 Days
  • 水印大师VIP-包周会员7 Days trial$7.997 Days
Show 2 more
  • 水印大师VIP-包月会员1 Month trial$14.991 Month
  • 包年会员$39.991 Year
One-time5
  • 80积分$3.99
  • 280积分$9.99
  • 580积分$19.99
Show 2 more
  • 终生会员$39.99
  • 1400积分$39.99
6 purchases

RootKey

One-time6
  • Upgrade 1 to 3 Devices$4.99
  • 1 Device · Lifetime$9.99
  • 3 Devices · Lifetime$14.99
Show 3 more
  • Upgrade 3 to 5 Devices$14.99
  • Upgrade 1 to 5 Devices$19.99
  • 5 Devices · Lifetime$29.99

Questions

Is 水印大师 free?
水印大师 is free to download, with in-app purchases available.
Is RootKey free?
RootKey is free to download, with in-app purchases available.
Which has better reviews, 水印大师 or RootKey?
水印大师 and RootKey are both rated 5.0 out of 5 on the App Store, from 13 and 1 ratings respectively.
Do 水印大师 or RootKey have ads?
Neither 水印大师 nor RootKey shows ads.
Which is updated more often, 水印大师 or RootKey?
水印大师 ships an update fortnightly, and RootKey daily. Most recently, 水印大师 was updated on October 30, 2026 and RootKey on October 31, 2026.

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