云证签 vs Contract Lab
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
云证签
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云证签,中国金融认证中心CFCA为您打造的用于安全认证的数字签名工具!为无纸化办公、在线交易、电子合同等各种业务场景提供安全合规的数字证书,为您的业务保驾护航。 主要功能有: 1.配置服务地址:云证签支持内网部署服务,可通过扫码或手动输入地址的方式与服务连接。 2.证书下载:同时支持SM2及RSA证书安装到手机端,用于身份认证和扫码签名等。 3.证书登录:支持直接选择手机端安装的用户证书进行手机端APP登录。 4.扫码登录:用户在PC端访问业务系统时,业务系统会产生安全二维码,使用云证签APP扫码签名可协助用户登录业务系统。 5.扫码签名:用户在业务系统进行业务处理时,可使用云证签APP扫码签名以保证业务的真实有效。 6.手写签章、免认证设置:支持用户通过手写签名申请一张服务器托管证书,用户PC端电子合同等应用使用,并且可以进行免认证时间设置。
Contract Lab
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ContractLab is an analytical calculator for the trade-up contract mechanic inside Counter-Strike 2. It helps players plan material combinations before they execute contracts inside Valve's official game client. This is a calculator and reference tool. ContractLab does NOT: • Execute any in-game actions or interact with Valve game servers • Facilitate buying, selling, or trading of virtual items between users • Provide financial, investment, or trading advice • Operate any form of gambling, loot box, or lottery mechanic — FEATURES — • Knapsack-based contract solver: compute optimal material combinations under wear-value and quantity constraints • Wear-value precision calculator down to 7 decimal places • Multi-platform market price reference (Buff, Steam Market, C5, YouPin, CSFloat, EcoSteam) — data is fetched from each platform's public API on user request, ContractLab does not store or proxy purchase data • Skin database with collection / rarity / wear-tier metadata • Local-first compute: contract analysis runs entirely on-device — DISCLAIMER — ContractLab is an independent tool developed by fans, not affiliated with, endorsed by, or sponsored by Valve Corporation. Counter-Strike, CS:GO, CS2, and all related marks are trademarks of Valve Corporation. Market price data is informational only and may not reflect real-time prices. Virtual item prices fluctuate; nothing in this app constitutes investment, financial, or trading advice. Use at your own discretion. — PRIVACY — ContractLab does not track you across other apps or websites. We do not use the IDFA. Third-party market account credentials are stored only in your device's Keychain and never transmitted to our servers. See the in-app privacy notice for full details. Questions or feedback: support@cs-contract.com
Screenshots
Verdict
The clearest difference is update cadence: Contract Lab at weekly against 云证签's every 2 months. 云证签's advantage is iOS requirement (11.0 vs 18.0). On price, ads, in-app purchases and device support 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.
云证签 ships an update every 2 months, Contract Lab weekly. The most recent releases landed on September 29, 2026 and October 4, 2026 respectively.
| Parameter | 云证签 | Contract Lab |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 58 MB | 69 MB |
| Age rating | 4+ | 4+ |
| Developer | 中国金融认证中心 | 奇 林 |
In-app purchases
云证签
No in-app purchases
Contract Lab
No in-app purchases









