Comparison

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.

Head to head
About

掌上信手书

Features
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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

About

石化招采

Features
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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

掌上信手书2 screens
石化招采1 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

Scorecard1 real difference · 7 level
掌上信手书 versus 石化招采: the parameters behind the verdict, then further details
Parameter掌上信手书石化招采
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.010.0 — better
Further details — not scored
Size97 MB95 MB
Age rating17+4+
DeveloperBeijing Certificate Authority Co., Ltd.China Petrochemical Corporation

In-app purchases

None

掌上信手书

No in-app purchases

None

石化招采

No in-app purchases

Questions

Is 掌上信手书 free?
掌上信手书 is free to download, with no in-app purchases.
Is 石化招采 free?
石化招采 is free to download, with no in-app purchases.
Do 掌上信手书 or 石化招采 have ads?
Neither 掌上信手书 nor 石化招采 shows ads.
Which is updated more often, 掌上信手书 or 石化招采?
掌上信手书 ships an update every 2 months, and 石化招采 every 2 months. Most recently, 掌上信手书 was updated on October 24, 2026 and 石化招采 on October 27, 2026.

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