# MemSurf vs PrepFast

The clearest difference is ads: PrepFast at none against MemSurf's shown. PrepFast also leads on device support (3 vs 1) and iOS requirement (15.1 vs 26). MemSurf's advantage is update cadence (every 8 days vs every 6 weeks). On price and in-app purchases there is nothing between them.

Both are free to download. MemSurf sells 7 in-app purchases, starting at $9.99 per month and PrepFast sells 6 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

MemSurf ships an update every 8 days, PrepFast every 6 weeks. The most recent releases landed on August 20, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | MemSurf | PrepFast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/memsurf-adaptive-learning/id6745132314/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 8 days** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 237 MB | 66 MB |
| Requires iOS | 26 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sehajroop Singh](https://appshunter.io/developer/1810928916) | [Sagar Angadi](https://appshunter.io/developer/1892388534) |

## What reviewers say

### MemSurf

[App page](https://appshunter.io/ios/app/memsurf-adaptive-learning/id6745132314)

This app transforms your collected notes into personalized lessons and daily exercises to enhance knowledge retention. It adapts to your learning speed and goals, helping you build long-term understanding and recall.

**Highlights:** Bespoke lessons from your notes, Short daily exercises, Science-based spaced repetition, Personalized learning goals, Sprint and deadline modes, Habit-building streaks

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $9.99 | per month |
| Pro Yearly | $95.99 | per year |
| Tiny Boost | $0.99 | one-time |
| AI Credits Small Boost | $2.99 | one-time |
| Purchase Gems | $4.99 | one-time |
| AI Credits Medium Boost | $6.99 | one-time |
| AI Credits Heavy Boost | $12.99 | one-time |


### PrepFast

[App page](https://appshunter.io/ios/app/prepfast-notes-to-questions/id6762001807)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly Early | $3.99 | per 7 days |
| Premium Weekly | $4.99 | per 7 days |
| Premium Monthly Early | $9.99 | per month |
| Premium Monthly | $12.99 | per month |
| Premium Annual Early | $49.99 | per year |
| Premium Annual | $59.99 | per year |


## Frequently asked questions

### Is MemSurf free?

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

### Is PrepFast free?

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

### Do MemSurf or PrepFast have ads?

MemSurf shows ads; PrepFast does not.

### Which is updated more often, MemSurf or PrepFast?

MemSurf ships an update every 8 days, and PrepFast every 6 weeks. Most recently, MemSurf was updated on August 20, 2026 and PrepFast on September 15, 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.*