# PQI Air Pen+ vs VoltKeep

The clearest difference is in-app purchases: PQI Air Pen+ at none against VoltKeep's 2. PQI Air Pen+ also leads on iOS requirement (8.0 vs 17.0). VoltKeep's advantage is update cadence (every 3 days vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. VoltKeep sells 2 in-app purchases, starting at $4.99 per month. PQI Air Pen+ asks for nothing beyond the download.

PQI Air Pen+ ships an update every 5 weeks, VoltKeep every 3 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PQI Air Pen+ | VoltKeep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/pqi-air-pen-plus/id569788913/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 days** |
| Monetization | Free | — |
| Size | 28 MB | 74 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Power Quotient International Co., Ltd.](https://appshunter.io/developer/480977683) | [Yuto Furudate](https://appshunter.io/developer/1886072871) |

## What reviewers say

### PQI Air Pen+

[App page](https://appshunter.io/ios/app/pqi-air-pen-plus/id569788913)

Wirelessly access and manage files stored on a PQI Air Pen WiFi Flash Drive. Browse documents, images, and audio/video files, with playback support for media. Configure WiFi settings and perform device resets.

**Highlights:** Browse remote PQI Air Pen contents, Browse local device files, Download files to local storage, Browse and play media files, Supports various document formats, Configure WiFi settings

**In-app purchases:** none


### VoltKeep

[App page](https://appshunter.io/ios/app/voltkeep-tesla/id6760900723)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $4.99 | per month |
| Yearly Plan | $49.99 | per year |


## Frequently asked questions

### Is PQI Air Pen+ free?

PQI Air Pen+ is free to download, with no in-app purchases.

### Is VoltKeep free?

VoltKeep is free to download, with in-app purchases available.

### Do PQI Air Pen+ or VoltKeep have ads?

Neither PQI Air Pen+ nor VoltKeep shows ads.

### Which is updated more often, PQI Air Pen+ or VoltKeep?

PQI Air Pen+ ships an update every 5 weeks, and VoltKeep every 3 days. Most recently, PQI Air Pen+ was updated on November 1, 2026 and VoltKeep on October 31, 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.*