掌上信手书 vs 石化招采
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
掌上信手书
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掌上信手书 北京数字认证股份有限公司官方出品,新一代移动数字证书&电子签名平台 【一部手机 证书即办即用】 – 免 USBKey、免驱动、免线下窗口,3 分钟完成身份认证与证书签发 – 证书一站式全生命周期管理,证书状态实时可视 – APP内直接预览文件,真正做到随时随地一键签署 【为什么选择掌上信手书】 – 政务大厅:不动产登记、工商年报、公积金提取,一部手机全搞定 – 电子招投标:与各地公共资源交易中心无缝对接,标书加密、开标解密零门槛 – 医疗教育:电子病历、电子成绩单、电子合同,患者、学生、家长指尖完成 – 企业办公:人事、采购、销售合同签署在线闭环,成本降低效率翻倍 【合规资质】 • 国家密码管理局《电子认证服务使用密码许可证》 • 工信部《电子认证服务许可证》 • 公安部《信息系统安全等级保护》三级备案
石化招采
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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
The clearest difference is iOS requirement: 石化招采 at 10.0 against 掌上信手书's 13.0. On price, update cadence, 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
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 October 24, 2026 and October 27, 2026 respectively.
| Parameter | 掌上信手书 | 石化招采 |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 97 MB | 95 MB |
| Age rating | 17+ | 4+ |
| Developer | Beijing Certificate Authority Co., Ltd. | China Petrochemical Corporation |
In-app purchases
掌上信手书
No in-app purchases
石化招采
No in-app purchases









