# NUS Mobile key vs DouDouBear

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.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

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

## The numbers

| Metric | NUS Mobile key | DouDouBear |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/doudoubear/id6762106052/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 6 days** |
| Monetization | — | Free |
| Size | 114 MB | 54 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Trevo Pte Ltd](https://appshunter.io/developer/1777756379) | [DOUDOUBEAR K.K](https://appshunter.io/developer/1892938111) |

## What reviewers say

### NUS Mobile key

[App page](https://appshunter.io/ios/app/nus-mobile-key/id6744627930)

**Features:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none


### DouDouBear

[App page](https://appshunter.io/ios/app/doudoubear/id6762106052)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*