信手书 vs 石化招采
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
信手书
Read full descriptionHide full description
信手书是一款电子签名工具,为用户提供数字证书及签名服务,适用于各种无纸化应用场景。 全国各个行业首选互联网电子签名产品。 主要功能: 1、移动端认证登录:用户在手机端访问业务系统,选择信手书认证登录,用户运用信手书APP提供数字证书进行授权登录。 2、PC端扫描登录:用户在PC端访问业务系统,选择信手认证登录,业务系统产生安全可靠的二维码,用户运用信手书APP扫描二维码进行授权登录。 3、数字签名:用户在登录信手书APP,基于信手书APP数字证书或数字证书扫描方式,对业务系统推送过来的关键数据进行签名,保证业务数据合法有效。 4、移动端个性化签名图像采集:系统默认、手动设置、拍照上传。 5、下载、重置安全合法的电子数字证书,系统自动管理个人电子数字证书。 6、可以设置密码、指纹、人脸等多种方式进行签名操作。 7、提供可设置管理的记住密码机制。
石化招采
Read full descriptionHide full description
石化招采app应用主要满足中国石化建设工程电子招标投标交易平台用户使用,提供移动端业务功能的查询及审批服务;实现用户CA的新签、补签、续签等功能,同时提供招标文件、投标文件的加密解密及签章等服务。
Screenshots
Verdict
信手书 and 石化招采 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 18, 2026 and September 15, 2026 respectively.
| Parameter | 信手书 | 石化招采 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 11 | 10.0 — better |
| Further details — not scored | ||
| Size | 54 MB | 95 MB |
| Age rating | 12+ | 4+ |
| Developer | Beijing Certificate Authority Co., Ltd. | China Petrochemical Corporation |
In-app purchases
信手书
No in-app purchases
石化招采
No in-app purchases









