# Keele SU vs Scent Stack

The clearest difference is in-app purchases: Keele SU at none against Scent Stack's 2. Scent Stack's advantage is update cadence (every 2 days vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Scent Stack sells 2 in-app purchases, starting at $3.99 per 7 days. Keele SU asks for nothing beyond the download.

Keele SU ships an update every 3 months, Scent Stack every 2 days. The most recent releases landed on October 19, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Keele SU | Scent Stack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Size | 166 MB | 36 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [MSL Membership Solutions Ltd](https://appshunter.io/developer/1076872752) | [ECOFLUX LTD](https://appshunter.io/developer/6790036661) |

## What reviewers say

### Keele SU

[App page](https://appshunter.io/ios/app/keele-su/id1579307063)

**Features:** macOS Compatibility

**In-app purchases:** none


### Scent Stack

[App page](https://appshunter.io/ios/app/scent-stack/id6799661658)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.99 | per 7 days |
| Yearly | $29.99 | per year |


## Frequently asked questions

### Is Keele SU free?

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

### Is Scent Stack free?

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

### Do Keele SU or Scent Stack have ads?

Neither Keele SU nor Scent Stack shows ads.

### Which is updated more often, Keele SU or Scent Stack?

Keele SU ships an update every 3 months, and Scent Stack every 2 days. Most recently, Keele SU was updated on October 19, 2026 and Scent Stack on October 16, 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.*