# PromptFluent vs Plainly AI

The clearest difference is in-app purchases: PromptFluent at none against Plainly AI's 1. Plainly AI's advantage is update cadence (monthly vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Plainly AI sells 1 one-off in-app purchase. PromptFluent asks for nothing beyond the download.

PromptFluent ships an update every 3 months, Plainly AI monthly. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PromptFluent | Plainly AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/plainly-ai/id6763172251/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 38 MB | 33 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Floyd Piedad](https://appshunter.io/developer/304880823) | [Kristopher Anderson](https://appshunter.io/developer/1895197898) |

## What reviewers say

### PromptFluent

[App page](https://appshunter.io/ios/app/promptfluent-learn-ai/id6760666003)

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

**In-app purchases:** none


### Plainly AI

[App page](https://appshunter.io/ios/app/plainly-ai/id6763172251)

Learn about artificial intelligence in simple terms with no jargon. This app breaks down complex AI concepts into easy-to-understand lessons with everyday examples. It offers free introductory modules and a glossary, with an option to unlock the full library for a one-time purchase.

**Highlights:** Plain English AI explanations, Everyday examples, Key takeaways and practical tips, Glossary of AI terms, Adjustable text size and dark mode, Progress tracking on device

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Library | $4.99 | one-time |


## Frequently asked questions

### Is PromptFluent free?

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

### Is Plainly AI free?

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

### Do PromptFluent or Plainly AI have ads?

Neither PromptFluent nor Plainly AI shows ads.

### Which is updated more often, PromptFluent or Plainly AI?

PromptFluent ships an update every 3 months, and Plainly AI monthly. Most recently, PromptFluent was updated on October 31, 2026 and Plainly AI on October 24, 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.*