Comparison

PDFW·电子签名 vs CardBal

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

Head to head
About

PDFW·电子签名

Features
Read full description

一款注重隐私的 PDF 签名工具。所有操作在设备本地完成,无需联网,不收集任何个人信息。 【核心功能】 • 手写签名 - 用手指或 Apple Pencil 创建个性签名 • 印章盖章 - 支持自定义文字印章、图片印章、骑缝章 • 添加文本 - 自由添加文字,支持多种字体和颜色 • 添加日期 - 快速插入日期,多种格式可选 • 批注标记 - 高亮、下划线、删除线、手写批注 【PDF 工具箱】 • 合并 PDF - 将多个 PDF 合并为一个文件 • 压缩 PDF - 减小文件体积,方便分享 • PDF 加密 - 设置密码保护文档安全 • PDF 转图片 - 将 PDF 页面导出为图片 • 图片转 PDF - 将照片快速生成 PDF • 页面编辑 - 旋转、裁剪 PDF 页面 【隐私保护】 • 完全离线运行,无需网络连接 • 不收集、不上传任何用户数据 • 不接入第三方 SDK 或广告 • 文件仅保存在您的设备中 适用于合同签署、文件审批、表单填写等场景。 如有问题或建议,欢迎联系:crh@un.net.cn

About

CardBal

Read full description

CardBal turns your iPhone into a pro reader for transit and stored-value cards. Hold a card to the top of your iPhone to see its balance, rides and card details, and the raw data behind them. READ • Balance and remaining trips • Ride history with stations, lines, distances and fares where the card stores them • Card details such as card family, number, issue date and technology • Raw data and a full hex export, with an optional Developer Mode for KS X 6924 cards SEE WHERE YOU'VE BEEN • Ride Map draws the routes your cards remember • Transit Atlas maps every city and province you have ridden in KEEP YOUR CARDS • A wallet of every card you have read, with names, icons and your own card photos • iCloud backup and file export • Card numbers can be shown in full, masked or hidden APPLE WALLET CARDS Read a supported Apple Wallet transit card on another iPhone or Apple Watch with Service Mode turned on. SUPPORTED CARDS Japan (FeliCa): Suica, PASMO, ICOCA, SUGOCA, nimoca, Kitaca, manaca, TOICA, Hayakaken, SAPICA, IruCa, OKICA and more Japan (e-money): nanaco, Rakuten Edy, WAON Greater China (T-Union): 300+ city cards, including Beijing, Shanghai, Guangzhou and Shenzhen, plus City Union cards Hong Kong: Octopus South Korea (KS X 6924): T-money, EZL, Cashbee Mongolia: U-Money France (Calypso): Lignes d'Azur Readable balances and history depend on the card, its issuer and the data stored on it. CardBal reads card information; it cannot top up cards. CardBal is an independent reader and is not affiliated with transit operators.

Screenshots

PDFW·电子签名4 screens
CardBal4 screens

Verdict

The call

The clearest difference is in-app purchases: CardBal at none against PDFW·电子签名's 1. PDFW·电子签名's advantage is device support (3 vs 1). On price, update cadence, ads and iOS requirement 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. PDFW·电子签名 sells 1 one-off in-app purchase. CardBal asks for nothing beyond the download.

UpkeepUpdate frequency

PDFW·电子签名 ships an update every 3 weeks, CardBal every 2 weeks. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 4 level
PDFW·电子签名 versus CardBal: the parameters behind the verdict, then further details
ParameterPDFW·电子签名CardBal
PriceFreeFree
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better16.0
Further details — not scored
Size3 MB51 MB
Age rating4+4+
Developer上海寻程网络科技有限公司Kitta Co.

In-app purchases

1 purchases

PDFW·电子签名

One-time1
  • 解锁完整功能$29.99
None

CardBal

No in-app purchases

Questions

Is PDFW·电子签名 free?
PDFW·电子签名 is free to download, with in-app purchases available.
Is CardBal free?
CardBal is free to download, with no in-app purchases.
Do PDFW·电子签名 or CardBal have ads?
Neither PDFW·电子签名 nor CardBal shows ads.
Which is updated more often, PDFW·电子签名 or CardBal?
PDFW·电子签名 ships an update every 3 weeks, and CardBal every 2 weeks. Most recently, PDFW·电子签名 was updated on October 28, 2026 and CardBal on October 25, 2026.

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