# Piply AI vs Unfog

The clearest difference is update cadence: Unfog at every 2 days against Piply AI's every 9 days. Piply AI's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Piply AI sells 3 in-app purchases, starting at $4.99 per 7 days and Unfog sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Piply AI ships an update every 9 days, Unfog every 2 days. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Piply AI | Unfog |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/piply-ai-study-and-exam-prep/id6759463981/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 76 MB | 80 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Reuel, LLC](https://appshunter.io/developer/1853929345) | [BITSEC SP. Z O.O.](https://appshunter.io/developer/1801990616) |

## What reviewers say

### Piply AI

[App page](https://appshunter.io/ios/app/piply-ai-study-and-exam-prep/id6759463981)

Consolidate all your study materials into a single platform. Organize courses, create revision tools from your own content, and track your learning time. Get assignment help and collaborate with classmates for effective exam preparation.

**Highlights:** Organize course materials, Generate quizzes and flashcards, Import timetables, Ask AI for explanations, Track study time, Collaborate with classmates

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| StudyFit Weekly Premium Offer | $4.99 | per 7 days |
| Piply Monthly Premium Offer | $12.99 | per month |
| StudyFit Yearly Premium Offer | $89.99 | per year |


### Unfog

[App page](https://appshunter.io/ios/app/unfog-feynman-study-notes/id6776245365)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unfog weekly | $2.99 | per 7 days |
| Unfog Monthly | $17.99 | per month |
| Unfog Annual | $29.99 | per year |


## Frequently asked questions

### Is Piply AI free?

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

### Is Unfog free?

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

### Do Piply AI or Unfog have ads?

Neither Piply AI nor Unfog shows ads.

### Which is updated more often, Piply AI or Unfog?

Piply AI ships an update every 9 days, and Unfog every 2 days. Most recently, Piply AI was updated on October 31, 2026 and Unfog on November 5, 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.*