Comparison

NUS Mobile key vs DouDouBear

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

Head to head

★ 3.02 ratingsView app →

About

NUS Mobile key

Features

Read full description

Mobile key access for on-campus housing The NUS Housing Mobile Key app offers a convenient and secure way for residents of National University of Singapore (NUS) housing to access their rooms using their smartphones. Whether you're a student, faculty member, or guest, this app enhances your housing experience by replacing physical keys with a digital solution.

About

DouDouBear

Rent electric-assisted bicycles conveniently by scanning a QR code with your smartphone. Access a smart self-rental service for easy urban mobility.

Highlights

Electric-assisted bicycle rental
QR code scanning for rental
Smart self-rental service
Convenient urban mobility

Features

Read full description

DouDouBear provides smart electric-assisted bicycle self-rental service. Simply scan the QR code with your phone.

Screenshots

NUS Mobile key3 screens

DouDouBear3 screens

Verdict

The call

The clearest difference is update cadence: DouDouBear at every 6 days against NUS Mobile key's every 6 weeks. 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

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

NUS Mobile key ships an update every 6 weeks, DouDouBear every 6 days. Both last shipped on October 13, 2026.

Scorecard1 real difference · 9 level

NUS Mobile key versus DouDouBear: the parameters behind the verdict, then further details
Parameter	NUS Mobile key	DouDouBear
Price	Free	Free
Rating	—	3.0 (2 ratings) — better
Positive reviews	—	0.0% of reviews
Number of ratings	—	2 — better
Update frequency	Every 6 weeks	Every 6 days — better
Ads	No	No
In-app purchases	No	No
Monetization	—	Free
Devices	iPhone, iPod	iPhone, iPod
Requires iOS	13.0	13.0
Further details — not scored
Size	114 MB	54 MB
Age rating	4+	17+
Developer	Trevo Pte Ltd	DOUDOUBEAR K.K

In-app purchases

None

NUS Mobile key

No in-app purchases

None

DouDouBear

No in-app purchases

Questions

Is NUS Mobile key free?

NUS Mobile key is free to download, with no in-app purchases.

Is DouDouBear free?

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

Do NUS Mobile key or DouDouBear have ads?

Neither NUS Mobile key nor DouDouBear shows ads.

Which is updated more often, NUS Mobile key or DouDouBear?

NUS Mobile key ships an update every 6 weeks, and DouDouBear every 6 days. Most recently, NUS Mobile key was updated on October 13, 2026 and DouDouBear on October 13, 2026.