# AI vs Prompts by E

The clearest difference is in-app purchases: AI at none against Prompts by E's 1. AI also leads on iOS requirement (15.6 vs 26.0). Prompts by E's advantage is ads (none vs shown) and update cadence (every 2 months vs every 5 months). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. Prompts by E sells 1 in-app purchase, starting at $0.99 per month. AI asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for AI against 5.0 for Prompts by E. Both are backed by a comparable volume of ratings — 5 and 5 respectively.

AI ships an update every 5 months, Prompts by E every 2 months. The most recent releases landed on October 16, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | AI | Prompts by E |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (5 ratings)](https://appshunter.io/ios/app/ai-dea-ai-idea-concretization/id6446606152/reviews) | [5.0 (5 ratings)](https://appshunter.io/ios/app/prompts-by-e-string/id6450276417/reviews) |
| Number of ratings | 5 | 5 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 74 MB | 18 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [yu nakamura](https://appshunter.io/developer/1079316668) | [E-String Technologies, Inc.](https://appshunter.io/developer/294199643) |

## What reviewers say

### AI

[App page](https://appshunter.io/ios/app/ai-dea-ai-idea-concretization/id6446606152)

This app leverages AI to transform simple memos into detailed, actionable ideas. It helps users expand creativity and explore new perspectives, ideal for those who need help concretizing or refining initial concepts.

**Highlights:** Quick memo function, AI-generated idea provision, Detailed idea expansion, Multiple idea perspectives, Idea saving and management

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

**In-app purchases:** none


### Prompts by E

[App page](https://appshunter.io/ios/app/prompts-by-e-string/id6450276417)

This app helps you create, manage, and use AI prompt templates. It generates easy-to-fill forms for your prompts and copies the final output to your clipboard for use in other generative AI applications.

**Highlights:** Create and manage prompt templates, Generate easy-to-fill forms for prompts, Copy generated prompts to clipboard, Use with generative AI apps, Intuitive interface

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Prompts Pro Monthly | $0.99 | per month |


## Frequently asked questions

### Is AI free?

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

### Is Prompts by E free?

Prompts by E is free to download, with in-app purchases available.

### Which has better reviews, AI or Prompts by E?

AI and Prompts by E are both rated 5.0 out of 5 on the App Store, from 5 and 5 ratings respectively.

### Do AI or Prompts by E have ads?

AI shows ads; Prompts by E does not.

### Which is updated more often, AI or Prompts by E?

AI ships an update every 5 months, and Prompts by E every 2 months. Most recently, AI was updated on October 16, 2026 and Prompts by E on September 24, 2026.

---

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