Comparison

UNDERNEXT2 vs NavJack

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

Head to head

About

UNDERNEXT2

Browse products with an intuitive interface and receive real-time notifications for shipments and promotions. Offers secure payment options including credit cards and convenience store pickup. Sign up easily with your mobile number.

Highlights

Intuitive product browsing
Shipment and pickup notifications
Real-time promotion push notifications
Secure encrypted credit card payments
Convenience store pickup and payment
Mobile number sign-up

Features

Read full description

* 直覺優化的操作介面、輕輕一滑就可瀏覽所有商品 * 商品出貨、可取貨時發送提醒 * 優惠促銷活動即時推播 * 安全第一：最高等級加密的信用卡付款功能 * 多元付款：全家超商取貨付款、信用卡一次付清、信用卡分期 * 使用『手機號碼』即可加入會員 * 出示獨家優惠券，即可獲得現場折扣

About

NavJack

Features

Read full description

※NavJack台灣製造保護殼/保護皮套! ※ 為施華洛世奇為品牌夥伴打造頂級的優質配件! ※ 全館免運! ※ 七天鑑賞期! ※ 多種機型3C配件可挑選購! ※ 使用『手機號碼』即可加入會員! ※ 獨家優惠券，折扣大方送!

Screenshots

UNDERNEXT24 screens

NavJack4 screens

Verdict

The call

The clearest difference is ads: NavJack at none against UNDERNEXT2's shown. On price, update cadence, 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

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

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 14, 2026 and October 6, 2026 respectively.

Scorecard1 real difference · 7 level

UNDERNEXT2 versus NavJack: the parameters behind the verdict, then further details
Parameter	UNDERNEXT2	NavJack
Price	Free	Free
Positive reviews	20.0% of reviews	—
Update frequency	Monthly	Monthly
Ads	Yes	No — better
In-app purchases	No	No
Monetization	Ad-supported	—
Devices	iPhone	iPhone
Requires iOS	17.0	17.0
Further details — not scored
Size	119 MB	104 MB
Age rating	17+	12+
Developer	MARCH GLOVES INC.	NavJack Co., Ltd.