# PAIR UP vs OnePile

The clearest difference is in-app purchases: OnePile at none against PAIR UP's 9. OnePile also leads on update cadence (every 2 months vs every 4 months). PAIR UP's advantage is iOS requirement (13.0 vs 15.5). On price, ads and device support there is nothing between them.

Both are free to download. PAIR UP sells 9 in-app purchases, starting at $19.99 per month. OnePile asks for nothing beyond the download.

PAIR UP ships an update every 4 months, OnePile every 2 months. The most recent releases landed on September 18, 2026 and August 20, 2026 respectively.

## The numbers

| Metric | PAIR UP | OnePile |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 12.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 53 MB | 170 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 9+ |
| Developer | [Mars Concepts Limited](https://appshunter.io/developer/1560797471) | [Onepile Tech Limited](https://appshunter.io/developer/1698291545) |

## What reviewers say

### PAIR UP

[App page](https://appshunter.io/ios/app/pair-up-applied-metaphysics/id1563181044)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pair Up Advance Membership | $19.99 | per month |
| Pair Up 高級會籍 | $29.99 | per month |
| Pair Up VIP Membership (1 m.) | $39.99 | per month |
| Pair Up Advance Membership | $39.99 | per 3 months |
| Pair Up Advance Membership | $71.99 | per 3 months |
| Pair Up Advance Membership | $129.99 | per year |
| Pair Up VIP 會籍 | $189.99 | per 3 months |
| Pair Up VIP Membership (12 m.) | $299.99 | per year |
| Pair Up Matching Report | $49.99 | one-time |


### OnePile

[App page](https://appshunter.io/ios/app/onepile/id6451439146)

Discover nearby book-swapping locations on a map and reserve books online. Collect or donate books at designated machines to earn environmental points and contribute to a low-carbon lifestyle.

**Highlights:** Map view of book swap points, Online book reservation, Book donation and collection, Environmental footprint tracking, Low-carbon lifestyle support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PAIR UP free?

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

### Is OnePile free?

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

### Do PAIR UP or OnePile have ads?

Neither PAIR UP nor OnePile shows ads.

### Which is updated more often, PAIR UP or OnePile?

PAIR UP ships an update every 4 months, and OnePile every 2 months. Most recently, PAIR UP was updated on September 18, 2026 and OnePile on August 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.*