# treVolo U vs GRF Audio

treVolo U and GRF Audio 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.

treVolo U ships an update every 2 months, GRF Audio every 3 months. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | treVolo U | GRF Audio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 130 MB | 129 MB |
| Requires iOS | **12.1** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BenQ Corporation](https://appshunter.io/developer/503100832) | [广州市声拓电子有限公司](https://appshunter.io/developer/1833382964) |

## What reviewers say

### treVolo U

[App page](https://appshunter.io/ios/app/trevolo-u/id1565297439)

**Features:** macOS Compatibility

**In-app purchases:** none


### GRF Audio

[App page](https://appshunter.io/ios/app/grf-audio/id6751082062)

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

**In-app purchases:** none


## Frequently asked questions

### Is treVolo U free?

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

### Is GRF Audio free?

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

### Do treVolo U or GRF Audio have ads?

Neither treVolo U nor GRF Audio shows ads.

### Which is updated more often, treVolo U or GRF Audio?

treVolo U ships an update every 2 months, and GRF Audio every 3 months. Most recently, treVolo U was updated on October 30, 2026 and GRF Audio on October 25, 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.*