# Teorem vs WhenToCop?

The clearest difference is rating: Teorem at 5.0 against WhenToCop?'s 4.5. Teorem also leads on iOS requirement (12.0 vs 16.0). WhenToCop?'s advantage is review sentiment (93% vs 75%) and ratings volume (16 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Teorem sells 4 in-app purchases, starting at $6.49 per month and WhenToCop? sells 1 in-app purchase, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

Teorem holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: WhenToCop? has 16 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 75% of Teorem's written reviews are positive against 93% of WhenToCop?'s, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 21, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Teorem | WhenToCop? |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/teorem/id1463118574/reviews)** | [4.5 (16 ratings)](https://appshunter.io/ios/app/whentocop/id1542957217/reviews) |
| Number of ratings | 1 | **16** |
| Positive reviews | 75.0% of reviews | **93.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Freemium | Free with in-app purchases |
| Size | 46 MB | 118 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Charlotte Henry](https://appshunter.io/developer/1463118573) | [WHENTOCOP](https://appshunter.io/developer/1542957219) |

## What reviewers say

### Teorem

[App page](https://appshunter.io/ios/app/teorem/id1463118574)

Buy and sell pre-loved clothing and accessories from a community of fashion enthusiasts. Discover unique pieces to refresh your wardrobe affordably and sustainably. Join a network focused on second-hand fashion.

**Highlights:** Sell pre-owned clothing and accessories, Discover unique fashion items, Personalizable seller space, Moderated service to prevent scams, Subscription for unlimited listings, Monthly boosters and photo uploads

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription | $6.49 | per month |
| Booster Ad | $0.99 | one-time |
| Hits of the Week | $4.99 | one-time |
| Hits of the Week | $9.99 | one-time |


### WhenToCop?

[App page](https://appshunter.io/ios/app/whentocop/id1542957217)

Find the best deals on sneakers and streetwear with a price comparator, release calendar, and promotions page. Get recommendations, set alerts for new drops and restocks, and access direct links to verified partners. Join a community of over a million users to discover your next favorite items.

**Highlights:** Price comparison for sneakers and streetwear, Curated recommendations and powerful search filters, Centralized promotions page with deal details, Upcoming and past release calendar, Direct links to verified partner websites, Customizable alerts for releases, restocks, and offers

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium WhenToCop? | $12.99 | per month |


## Frequently asked questions

### Is Teorem free?

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

### Is WhenToCop? free?

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

### Which has better reviews, Teorem or WhenToCop??

Teorem is rated higher. Teorem averages 5.0 out of 5 from 1 ratings, while WhenToCop? averages 4.5 from 16 ratings.

### Do Teorem or WhenToCop? have ads?

Neither Teorem nor WhenToCop? shows ads.

### Which is updated more often, Teorem or WhenToCop??

Teorem ships an update monthly, and WhenToCop? monthly. Most recently, Teorem was updated on September 21, 2026 and WhenToCop? on September 23, 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.*