Comparison

BLACKUP 블랙업 vs YZ

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

Head to head

BLACKUP 블랙업

Free

🛍️ Shopping

★ 4.315 ratingsView app →

Free

🛍️ Shopping

★ 4.929 ratingsView app →

About

BLACKUP 블랙업

Access exclusive discounts and special offers through this mobile application. Enjoy optimized features for on-the-go shopping, including automatic login, order tracking, and cart management. Stay updated with store notifications and connect with social media channels.

Highlights

Exclusive coupons and discounts
Automatic login
Order tracking
Shopping cart management
Store notifications
Social media access

Features

Read full description

Get exclusive special offers on the mobile app! Use the mobile app to enjoy features optimized for mobile devices and access exclusive special offers. Main features: Enjoy exclusive coupons and discounts Use automatic login Check and track your orders Manage your shopping cart and shipping info Receive store notifications Access social media channels Contact Customer Service

About

YZ

Discover and shop for Japanese street fashion brands like 9090s, Younger Song, genzai, and MySugarBabe (MSB). This official app provides a curated selection of popular streetwear items for easy browsing and purchasing.

Highlights

Shop Japanese street brands
Curated fashion selection
Official store app
Easy browsing and purchasing

Features

Read full description

YZ STORE OFFICIAL APP 9090sやYounger Song、genzai、MySugarBabe(MSB)などの日本のストリートブランドを取り扱うファッション通販アプリです。

Screenshots

BLACKUP 블랙업4 screens

YZ4 screens

Verdict

The call

The clearest difference is rating: YZ at 4.9 against BLACKUP 블랙업's 4.3. YZ also leads on review sentiment (48% vs 34%) and monetization model (free vs ad-supported). BLACKUP 블랙업's advantage is iOS requirement (14.0 vs 16.0). On price, ratings volume, update cadence and ads 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.

ReceptionRating · Positive reviews · Number of ratings

YZ holds the better App Store score, 4.9 against 4.3. Both are backed by a comparable volume of ratings — 15 and 29 respectively. Written reviews point the same way: 34% of BLACKUP 블랙업's written reviews are positive against 48% of YZ's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 20, 2026 and September 27, 2026 respectively.

Scorecard4 real differences · 6 level

BLACKUP 블랙업 versus YZ: the parameters behind the verdict, then further details
Parameter	BLACKUP 블랙업	YZ
Price	Free	Free
Rating	4.3 (15 ratings)	4.9 (29 ratings) — better
Positive reviews	33.8% of reviews	47.6% of reviews — better
Number of ratings	15	29 — better
Update frequency	Every 2 months	Every 2 months
Ads	No	No
In-app purchases	No	No
Monetization	Ad-supported	Free — better
Devices	iPhone, iPod — better	iPhone
Requires iOS	14.0 — better	16.0
Further details — not scored
Size	72 MB	59 MB
Age rating	4+	4+
Developer	(주)블랙업	yutori inc.

Customer experience

BLACKUP 블랙업

All ratings15 ratings

Positive80.0%

Neutral13.3%

Negative6.7%

Written reviews68 reviews

Positive33.8%

Neutral19.1%

Negative47.1%

YZ

All ratings29 ratings

Positive96.6%

Neutral3.4%

Negative0.0%

Written reviews21 reviews

Positive47.6%

Neutral19.0%

Negative33.3%

Bugs and requests

BLACKUP 블랙업

Reported bugs

23 issues

App opens to a white screen
Cannot open the home screen after update
Login fails repeatedly
Cannot access shopping cart
Wishlist items disappear

Show 18 more

Cannot access account section
Close button not working
Items take minutes to load
Cannot add items to cart
Selected size not reflected in cart
App crashes when scrolling
Cannot access wishlist
Cannot save favorite items
Repeated login required
Account deleted after update
Cannot log in with Apple account
App closes background music/videos
Cannot apply coupons
Cannot see product images
Cannot set username
App redirects to web version
Login errors after update
Wishlist button not working

Requested features

11 requests

Improve app speed and reduce lag
Fix issues with wishlist and cart items disappearing
Stabilize login and maintain login status
Ensure consistent language settings
Improve image loading performance

Show 6 more

Enable slide over functionality on iPad
Add sorting options for reviews (e.g., by popularity, recency)
Make the app more user-friendly and intuitive
Improve the process for refunds and exchanges
Fix the address input pop-up issue
Make the app feel distinct from the mobile web version

YZ

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

BLACKUP 블랙업

No in-app purchases

None

YZ

No in-app purchases

Questions

Is BLACKUP 블랙업 free?

BLACKUP 블랙업 is free to download, with no in-app purchases.

Is YZ free?

YZ is free to download, with no in-app purchases.

Which has better reviews, BLACKUP 블랙업 or YZ?

YZ is rated higher. BLACKUP 블랙업 averages 4.3 out of 5 from 15 ratings, while YZ averages 4.9 from 29 ratings.

Do BLACKUP 블랙업 or YZ have ads?

Neither BLACKUP 블랙업 nor YZ shows ads.

Which is updated more often, BLACKUP 블랙업 or YZ?

BLACKUP 블랙업 ships an update every 2 months, and YZ every 2 months. Most recently, BLACKUP 블랙업 was updated on September 20, 2026 and YZ on September 27, 2026.