# mEinstein vs Prompting Deck

The clearest difference is in-app purchases: mEinstein at none against Prompting Deck's 2. mEinstein also leads on iOS requirement (17.6 vs 26.0). Prompting Deck's advantage is ads (none vs shown) and update cadence (weekly vs every 2 weeks). On price there is nothing between them.

Both are free to download. Prompting Deck sells 2 in-app purchases, starting at $2.00 per month. mEinstein asks for nothing beyond the download.

mEinstein ships an update every 2 weeks, Prompting Deck weekly. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | mEinstein | Prompting Deck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (4 ratings)](https://appshunter.io/ios/app/meinstein/id6446581528/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 469 MB | 49 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [mEinstein LLC](https://appshunter.io/developer/1529132342) | [Christopher Peterson](https://appshunter.io/developer/1870006856) |

## What reviewers say

### mEinstein

[App page](https://appshunter.io/ios/app/meinstein/id6446581528)

This app empowers users to control and monetize their personal data through an ethical marketplace. It also acts as an AI companion, offering personalized insights and recommendations powered by generative models. Your data is stored locally, ensuring privacy and security.

**Highlights:** Ethical data marketplace, AI companion with LLM, Personalized recommendations, Data ownership and control, Local data storage, Transparent data monetization

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Prompting Deck

[App page](https://appshunter.io/ios/app/prompting-deck/id6757969857)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $2.00 | per month |
| Premium Yearly | $20.00 | per year |


## Frequently asked questions

### Is mEinstein free?

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

### Is Prompting Deck free?

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

### Do mEinstein or Prompting Deck have ads?

mEinstein shows ads; Prompting Deck does not.

### Which is updated more often, mEinstein or Prompting Deck?

mEinstein ships an update every 2 weeks, and Prompting Deck weekly. Most recently, mEinstein was updated on October 14, 2026 and Prompting Deck on October 11, 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.*