# Refwin App vs BladderUSG

Refwin App and BladderUSG are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Refwin App ships an update every 3 months, BladderUSG every 5 months. Both last shipped on September 20, 2026.

## The numbers

| Metric | Refwin App | BladderUSG |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Size | 34 MB | 11 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [唐山银耐联电子商务有限公司](https://appshunter.io/developer/1381056002) | [SonoStarMed](https://appshunter.io/developer/1113993886) |

## What reviewers say

### Refwin App

[App page](https://appshunter.io/ios/app/refwin-app/id1229970641)

**Features:** macOS Compatibility

**In-app purchases:** none


### BladderUSG

[App page](https://appshunter.io/ios/app/bladderusg/id1508441442)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Refwin App free?

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

### Is BladderUSG free?

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

### Do Refwin App or BladderUSG have ads?

Neither Refwin App nor BladderUSG shows ads.

### Which is updated more often, Refwin App or BladderUSG?

Refwin App ships an update every 3 months, and BladderUSG every 5 months. Most recently, Refwin App was updated on September 20, 2026 and BladderUSG on September 20, 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.*