# Teorem vs Mercoria

The clearest difference is in-app purchases: Mercoria at none against Teorem's 4. Teorem's advantage is iOS requirement (12.0 vs 16.4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Teorem sells 4 in-app purchases, starting at $6.49 per month. Mercoria asks for nothing beyond the download.

Teorem ships an update monthly, Mercoria every 3 weeks. The most recent releases landed on September 21, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Teorem | Mercoria |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/teorem/id1463118574/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Freemium | — |
| Size | 46 MB | 96 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Charlotte Henry](https://appshunter.io/developer/1463118573) | [Local Impact](https://appshunter.io/developer/1585962729) |

## 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 |


### Mercoria

[App page](https://appshunter.io/ios/app/mercoria/id6445839827)

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

**In-app purchases:** none


## Frequently asked questions

### Is Teorem free?

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

### Is Mercoria free?

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

### Do Teorem or Mercoria have ads?

Neither Teorem nor Mercoria shows ads.

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

Teorem ships an update monthly, and Mercoria every 3 weeks. Most recently, Teorem was updated on September 21, 2026 and Mercoria on September 26, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*