e+正方形和長方形 vs SJRC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
e+正方形和長方形
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利用工具，找出計算正方形和長方形的周界或面積的方法。 「現代教育研究社」研發了一系列教學工具及趣味App，以協助老師於課堂中進行建構數學概念的活動，同時也可讓學生在家中作自學之用。
SJRC
Access a vast library of over 3,000 books designed for educational settings. This platform supports multiple users simultaneously and is regularly updated with new titles, making it easy for teachers and students to find and explore reading materials.
- Over 3,000 books
- Supports multiple concurrent users
- Constantly updated library
- Detailed classification and search
- Aids school reading plans
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SJRC contains over 3,000 books, not only dedicated to source the best books, we are also: • The best partner for school teachers to advance students reading plan • Enable multiple concurrent users, can read anytime anywhere • The library is constantly updated so that teachers and students can browse or search their favorite books • With detailed classification, teachers and students can navigate and conduct book search LIKE and FOLLOW SJRC Facebook/Instagram page NOW to enjoy more in reading!
Screenshots
Verdict
The clearest difference is update cadence: SJRC at every 3 weeks against e+正方形和長方形's every 15 months. SJRC also leads on device support (3 vs 1). e+正方形和長方形's advantage is iOS requirement (11.0 vs 15.0). On price, 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.
e+正方形和長方形 ships an update every 15 months, SJRC every 3 weeks. The most recent releases landed on October 4, 2026 and October 1, 2026 respectively.
| Parameter | e+正方形和長方形 | SJRC |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.7 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 15 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 25 MB | 131 MB |
| Age rating | 4+ | 4+ |
| Developer | Modern Educational Research Society, LTD | Enrich Spot Limited |
In-app purchases
e+正方形和長方形
No in-app purchases
SJRC
No in-app purchases
