# HEPCon vs Obsidian

The clearest difference is update cadence: HEPCon at every 4 days against Obsidian's every 3 weeks. Obsidian's advantage is review sentiment (62% vs 50%) and chart position (#129 vs unranked). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

HEPCon ships an update every 4 days, Obsidian every 3 weeks. The most recent releases landed on October 8, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | HEPCon | Obsidian |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2.8K ratings)](https://appshunter.io/ios/app/obsidian-connected-notes/id1557175442/reviews)** |
| Number of ratings | — | **2.8K** |
| Positive reviews | 50.0% of reviews | **62.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Monetization | Free | Free |
| Best chart rank | — | **#129** |
| Size | 117 MB | 40 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Martin Vassilev](https://appshunter.io/developer/1286500650) | [Dynalist Inc.](https://appshunter.io/developer/1195392807) |

## What reviewers say

### HEPCon

[App page](https://appshunter.io/ios/app/hepcon/id1286500651)

This app provides a structured mobile agenda for scientific and professional conferences, connecting to existing systems. Attendees can access program details offline, build personalized schedules, and receive live updates. Organizers can offer a mobile companion without workflow changes.

**Highlights:** Browse full conference program with filtering, Offline access to abstracts and session details, Personalized schedule with reminders, Bookmark talks and export to calendar, Follow announcements and live updates, Access venue information and contacts, Participate in presentation discussions

**Features:** Vision Pro support

**In-app purchases:** none


### Obsidian

[App page](https://appshunter.io/ios/app/obsidian-connected-notes/id1557175442)

**Currently charting:** #129 Top Free · Productivity (US App Store)

Organize your thoughts and ideas with a powerful knowledge base that utilizes local Markdown files. This app acts as your personal second brain, accessible on your mobile device for seamless note-taking and idea connection.

**Highlights:** Local Markdown file storage, Customizable toolbar, Graph view for connections, Community plugins, Themes, iCloud sync

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Powerful features
- 👍 Customizable and flexible
- 🔒 Secure and private
- 💡 Innovative note-taking approach
- 🚀 Smooth mobile experience

**What reviewers complain about**

- 🐛 Sync issues and unreliable iCloud integration
- 🔋 Slow startup and performance issues on mobile
- 👎 Steep learning curve for new users
- 👎 Limited sorting and organization options
- 👎 Lack of WYSIWYG editing on mobile

**Reported bugs**

- Sync issues leading to data loss
- Freezing and crashing on mobile devices
- Editing bugs and text input issues

**Requested features**

- Improved sorting and organization options
- WYSIWYG editing on mobile
- Better integration with other cloud storage services
- More intuitive onboarding process for new users
- Native mobile widgets and share sheet integration


## Frequently asked questions

### Is HEPCon free?

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

### Is Obsidian free?

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

### Do HEPCon or Obsidian have ads?

Neither HEPCon nor Obsidian shows ads.

### Which is updated more often, HEPCon or Obsidian?

HEPCon ships an update every 4 days, and Obsidian every 3 weeks. Most recently, HEPCon was updated on October 8, 2026 and Obsidian on October 14, 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.*