# Threshold 4 Performance vs The Gray Space

Threshold 4 Performance and The Gray Space are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support 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.

## The numbers

| Metric | Threshold 4 Performance | The Gray Space |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Size | 40 MB | 50 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Threshold4 Performance LLC](https://appshunter.io/developer/1892070455) | [365 GRIND FITNESS LLC](https://appshunter.io/developer/1893126255) |

## What reviewers say

### Threshold 4 Performance

[App page](https://appshunter.io/ios/app/threshold-4-performance/id6761918919)

**Features:** macOS Compatibility

**In-app purchases:** none


### The Gray Space

[App page](https://appshunter.io/ios/app/the-gray-space/id6762149525)

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

**In-app purchases:** none


## Frequently asked questions

### Is Threshold 4 Performance free?

Threshold 4 Performance is free to download, with no in-app purchases.

### Is The Gray Space free?

The Gray Space is free to download, with no in-app purchases.

### Do Threshold 4 Performance or The Gray Space have ads?

Neither Threshold 4 Performance nor The Gray Space shows ads.

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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.*