USB vs 康軒AR四季星空
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
USB
Read full descriptionHide full description
APP用來註冊設定USB-921 地震儀, 安裝地震儀用戶, 可接收【P波警報】,【特快報】,【地震快報】,【最大震度】推播通知
康軒AR四季星空
Read full descriptionHide full description
AR四季星空學習特色： 1.透過360實境星空觀察當季星座 2.可聆聽星座故事加深學習印象 *配合國小自然教材認識春、夏、秋、冬等季節的主要星星與星座，聆聽星座故事加深學習印象。
Screenshots
Verdict
The clearest difference is update cadence: USB at every 3 months against 康軒AR四季星空's every 42 months. 康軒AR四季星空's advantage is iOS requirement (11.0 vs 13.0). 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.
USB ships an update every 3 months, 康軒AR四季星空 every 42 months. The most recent releases landed on August 18, 2026 and September 20, 2026 respectively.
| Parameter | USB | 康軒AR四季星空 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months — better | Every 42 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 201 MB | 160 MB |
| Age rating | 4+ | 4+ |
| Developer | Merry-Link Co.,Ltd. | 康軒文教事業 |
In-app purchases
USB
No in-app purchases
康軒AR四季星空
No in-app purchases
