# Mem vs Study Stack

The clearest difference is review sentiment: Study Stack at 100% against Mem's 41%. Study Stack also leads on rating (5.0 vs 4.4) and in-app purchases (none vs 4). Mem's advantage is ratings volume (126 vs 2) and update cadence (every 3 days vs fortnightly). On price, ads and device support there is nothing between them.

Both are free to download. Mem sells 4 in-app purchases, starting at $12.00 per month. Study Stack asks for nothing beyond the download.

Study Stack holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Mem has 126 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 41% of Mem's written reviews are positive against 100% of Study Stack's.

Mem ships an update every 3 days, Study Stack fortnightly. The most recent releases landed on September 28, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | Mem | Study Stack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (126 ratings)](https://appshunter.io/ios/app/mem-your-personal-ai-agent/id1578757028/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/study-stack/id1588432598/reviews)** |
| Number of ratings | **126** | 2 |
| Positive reviews | 41.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Fortnightly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 99 MB | 1 MB |
| Requires iOS | 18.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mem Labs, Inc.](https://appshunter.io/developer/1030154393) | [Erik Mederos](https://appshunter.io/developer/1591538592) |

## What reviewers say

### Mem

[App page](https://appshunter.io/ios/app/mem-your-personal-ai-agent/id1578757028)

This app acts as an AI-powered thought partner, capturing and organizing your ideas, meetings, and research. It allows you to use voice to create and edit notes, and an AI assistant can recall, summarize, and reorganize your information. It also surfaces relevant notes automatically and offers powerful search capabilities.

**Highlights:** Voice-to-text note creation and editing, AI-powered summarization and recall, Automatic organization and structuring of notes, Intelligent surfacing of related information, Deep search for any note, Cross-device synchronization, Offline access

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $12.00 | per month |
| Proactive | $29.00 | per month |
| Proactive | $59.00 | per month |
| Proactive | $99.00 | per month |

**What reviewers like**

- 🤖 AI-powered note organization and auto-categorization
- 💬 Integrated ChatGPT/AI chat assistant for research and synthesis
- 🎙️ Voice-to-text transcription with formatting
- 🔗 Intelligent linking of related notes
- ⚡ Fast and intuitive interface design

**What reviewers complain about**

- 🐛 Frequent app crashes and freezes
- 🔄 Unreliable syncing between devices
- 📱 iOS app significantly less featured than desktop version
- 🔐 Requires Google/Apple login (no email option)
- 💾 Data loss and notes disappearing unexpectedly

**Reported bugs**

- Notes disappearing without trace or recovery option
- Bottom navigation bar covering key buttons
- Settings popup incorrectly prompts to download app already installed
- Black bar covering AI tool input field on web version
- Photos not saving or disappearing after one day

**Requested features**

- True hands-free voice activation with Siri shortcuts
- Widget support for voice notes and Apple Watch
- Node/mind map graph visualization of note connections
- PDF and document export functionality
- Full markdown support


### Study Stack

[App page](https://appshunter.io/ios/app/study-stack/id1588432598)

Manage all your academic tasks, assignments, and exams in one organized place. Track daily courses, upcoming deadlines, and overdue work with clear visual indicators. Features a clean interface with light and dark mode support.

**Highlights:** Add courses with details, Track assignments and exams, View daily courses and upcoming deadlines, Mark assignments as complete, Sort lists by importance, Light and dark mode support

**In-app purchases:** none


## Frequently asked questions

### Is Mem free?

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

### Is Study Stack free?

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

### Which has better reviews, Mem or Study Stack?

Study Stack is rated higher. Mem averages 4.4 out of 5 from 126 ratings, while Study Stack averages 5.0 from 2 ratings.

### Do Mem or Study Stack have ads?

Neither Mem nor Study Stack shows ads.

### Which is updated more often, Mem or Study Stack?

Mem ships an update every 3 days, and Study Stack fortnightly. Most recently, Mem was updated on September 28, 2026 and Study Stack on June 4, 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.*