Comparison

e+正方形和長方形 vs 香港百年變變變

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

About

e+正方形和長方形

Features

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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。

About

香港百年變變變

Features

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香港百年變變變App是搭配圖書《香港百年變變變》的專屬App，讓重要的香港歷史場景形象、立體地出現於讀者面前。讀者從本App透過影像和聲音去領略當年的情景，可看到香港一百多年來的歷史變遷。擴增實境包括以下內容： ‧早期香港的小漁船 ‧早期香港的電車 ‧香港九七回歸時維港上空璀璨的煙花

Screenshots

香港百年變變變1 screens

Verdict

The call

The clearest difference is update cadence: e+正方形和長方形 at every 15 months against 香港百年變變變's every 47 months. 香港百年變變變's advantage is device support (3 vs 1). On price, ads, in-app purchases 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

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

e+正方形和長方形 ships an update every 15 months, 香港百年變變變 every 47 months. The most recent releases landed on October 4, 2026 and October 3, 2026 respectively.

Scorecard2 real differences · 5 level

e+正方形和長方形 versus 香港百年變變變: the parameters behind the verdict, then further details
Parameter	e+正方形和長方形	香港百年變變變
Price	Free	Free
Positive reviews	—	33.3% of reviews
Update frequency	Every 15 months — better	Every 47 months
Ads	No	No
In-app purchases	No	No
Devices	iPad	iPhone, iPad, iPod — better
Requires iOS	11.0	11.0
Further details — not scored
Size	25 MB	165 MB
Age rating	4+	4+
Developer	Modern Educational Research Society, LTD	Sun Ya Publications (HK) Ltd

In-app purchases

None

e+正方形和長方形

No in-app purchases

None

香港百年變變變

No in-app purchases

Questions

Is e+正方形和長方形 free?

e+正方形和長方形 is free to download, with no in-app purchases.

Is 香港百年變變變 free?

香港百年變變變 is free to download, with no in-app purchases.

Do e+正方形和長方形 or 香港百年變變變 have ads?

Neither e+正方形和長方形 nor 香港百年變變變 shows ads.

Which is updated more often, e+正方形和長方形 or 香港百年變變變?

e+正方形和長方形 ships an update every 15 months, and 香港百年變變變 every 47 months. Most recently, e+正方形和長方形 was updated on October 4, 2026 and 香港百年變變變 on October 3, 2026.