# PSMS57 vs Corpus

The clearest difference is in-app purchases: PSMS57 at none against Corpus's 2. PSMS57 also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Corpus sells 2 in-app purchases, starting at $12.99 per month. PSMS57 asks for nothing beyond the download.

## The numbers

| Metric | PSMS57 | Corpus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/corpus-ideas-worth-knowing/id6781227385/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 2 days |
| Monetization | — | Free |
| Size | 32 MB | 47 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Victor Alarcon](https://appshunter.io/developer/1540972481) | [omer roth](https://appshunter.io/developer/6781227387) |

## What reviewers say

### PSMS57

[App page](https://appshunter.io/ios/app/psms57/id6747346283)

**Features:** macOS Compatibility

**In-app purchases:** none


### Corpus

[App page](https://appshunter.io/ios/app/corpus-ideas-worth-knowing/id6781227385)

Engage in daily five-minute dialogues with historical thinkers to explore philosophy and economics. This app makes complex ideas approachable through interactive conversations and reflective questions, helping you build knowledge consistently.

**Highlights:** Daily dialogues with historical thinkers, Bite-sized lessons (5 minutes), Interactive questions for retention, Connects ideas to current events, Build a knowledge streak, Collect historical figures

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Corpus Monthly | $12.99 | per month |
| Corpus Yearly | $89.99 | per year |


## Frequently asked questions

### Is PSMS57 free?

PSMS57 is free to download, with no in-app purchases.

### Is Corpus free?

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

### Do PSMS57 or Corpus have ads?

Corpus shows ads; PSMS57 does not.

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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.*