青于蓝 vs QuestionBank
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
青于蓝
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青于蓝APP立足于打破传统家校沟通、校园媒体传播，打造高效率的家校沟通、教育资讯，APP集班级通知、课程表、成绩下发、班级文件存储、个人成长相册、班级刊物（即《云板报》）、校级刊物（即《云校刊》）等功能为一体，为学校、老师、家长和孩子提供一个更便捷、更畅达的信息沟通、资讯分享和校园支付平台。
QuestionBank
Effortlessly solve academic questions by taking a photo. AI-powered recognition handles complex formulas and symbols, providing quick answers. Offers various subscription plans for continuous learning support.
- Photo recognition of questions
- AI intelligent search
- Special symbol recognition (math formulas)
- Quick problem-solving
- Continuous membership subscriptions
- Multiple subscription plans
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[Photo search question] Is it too troublesome to manually input questions? With the search software, all you need to do is aim your phone camera at the question and take a photo. AI intelligently recognizes the question and searches with just one shot. With its powerful ability to recognize special symbols such as mathematical formulas, it reduces the hassle of symbol input and solves problems quickly. Instructions for Continuous Membership Subscription: -Subscription period: one month or one year -Payment: User payment credited to iTunes account -Unsubscribe: To unsubscribe, please manually turn off automatic subscription in Apple ID settings management 24 hours before the current subscription expires -Renewal: Apple iTunes account will be charged within 24 hours before expiration, and after successful deduction, the subscription period will be extended for one month or one year Privacy Policy: https://www.freeprivacypolicy.com/live/84a53436-3f8f-4c2d-9f7c-5ff907c9dab5 Terms of Use: https://www.freeprivacypolicy.com/live/2ee9bf39-5db5-4c15-bc92-8287134a0b7e
Screenshots
Verdict
The clearest difference is in-app purchases: 青于蓝 at none against QuestionBank's 8. 青于蓝 also leads on ads (none vs shown) and review sentiment (45% vs 15%). On price, device support 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
Both are free to download. QuestionBank sells 8 in-app purchases, starting at $0.99 per 7 days. 青于蓝 asks for nothing beyond the download.
青于蓝 ships an update every 3 weeks, QuestionBank every 2 months. The most recent releases landed on September 10, 2026 and September 23, 2026 respectively.
| Parameter | 青于蓝 | QuestionBank |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.7 (6 ratings) — better |
| Positive reviews | 45.0% of reviews — better | 15.0% of reviews |
| Number of ratings | — | 6 — better |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 — better | 13.3 |
| Further details — not scored | ||
| Size | 129 MB | 65 MB |
| Age rating | 17+ | 17+ |
| Developer | Beijing Home Call Express Data Technology Co., Ltd. | Foshan Fullstack Technology |
Customer experience
青于蓝
QuestionBank
In-app purchases
青于蓝
No in-app purchases
QuestionBank
- 周会员7 Days trial$0.997 Days
- 周会员3 Days trial$0.997 Days
- 周会员$0.997 Days
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- 月度会员$2.991 Month
- 连续包月会员3 Days trial$2.991 Month
- 年度会员$9.991 Year
- 连续包年会员3 Days trial$14.991 Year
- 一次性买断$49.99
