# BladderVol vs SmartUSG

The clearest difference is update cadence: SmartUSG at monthly against BladderVol's every 9 months. 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.

BladderVol ships an update every 9 months, SmartUSG monthly. The most recent releases landed on October 12, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | BladderVol | SmartUSG |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Monthly** |
| Size | 3 MB | 137 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Edge Life Technologies LLC](https://appshunter.io/developer/1663450410) | [SonoStarMed](https://appshunter.io/developer/1113993886) |

## What reviewers say

### BladderVol

[App page](https://appshunter.io/ios/app/bladdervol/id6749077780)

**Features:** macOS Compatibility

**In-app purchases:** none


### SmartUSG

[App page](https://appshunter.io/ios/app/smartusg/id6755596804)

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

**In-app purchases:** none


## Frequently asked questions

### Is BladderVol free?

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

### Is SmartUSG free?

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

### Do BladderVol or SmartUSG have ads?

Neither BladderVol nor SmartUSG shows ads.

### Which is updated more often, BladderVol or SmartUSG?

BladderVol ships an update every 9 months, and SmartUSG monthly. Most recently, BladderVol was updated on October 12, 2026 and SmartUSG on October 1, 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.*