# Not Emacs vs Möbius Sync

The clearest difference is in-app purchases: Not Emacs at none against Möbius Sync's 1. Not Emacs also leads on update cadence (every 2 weeks vs every 2 months) and iOS requirement (6.1 vs 14.1). Möbius Sync's advantage is ratings volume (140 vs 21). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Möbius Sync sells 1 one-off in-app purchase. Not Emacs asks for nothing beyond the download.

Not Emacs holds the better App Store score, 4.0 against 3.8. That said, the two scores are not equally well evidenced: Möbius Sync has 140 ratings behind it against 21, so its average is the more settled of the two. Written reviews complicate that: 50% of Not Emacs's written reviews are positive against 55% of Möbius Sync's, so the app with the better star average is not the one people write more warmly about.

Not Emacs ships an update every 2 weeks, Möbius Sync every 2 months. The most recent releases landed on October 16, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Not Emacs | Möbius Sync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (21 ratings)](https://appshunter.io/ios/app/not-emacs/id948330589/reviews)** | [3.8 (140 ratings)](https://appshunter.io/ios/app/mobius-sync/id1539203216/reviews) |
| Number of ratings | 21 | **140** |
| Positive reviews | 50.0% of reviews | **55.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 18 MB | 23 MB |
| Requires iOS | **6.1** | 14.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Marc Feeley](https://appshunter.io/developer/434534079) | [Pickup Infinity Limited](https://appshunter.io/developer/1118833408) |

## What reviewers say

### Not Emacs

[App page](https://appshunter.io/ios/app/not-emacs/id948330589)

A programmer's text editor that mimics common Emacs keybindings and supports iCloud document syncing across devices. It offers syntax highlighting for several languages and is optimized for external keyboards, with an extended virtual keyboard as a backup.

**Highlights:** Emacs keybinding support, iCloud document editing, Syntax highlighting (Lisp, Scheme, JS, CSS, XML), External Bluetooth keyboard optimization, Extended virtual keyboard

**Features:** macOS Compatibility

**In-app purchases:** none


### Möbius Sync

[App page](https://appshunter.io/ios/app/mobius-sync/id1539203216)

Synchronize files between your iOS devices and other Syncthing-supported platforms without relying on cloud storage. Manage multiple folders and remote devices, with options for sandbox or experimental cross-app sandbox syncing.

**Highlights:** File synchronization between iOS and other Syncthing devices, No cloud service required, Supports multiple folders and remote devices, Sync within app sandbox or other app sandboxes (paid), Uses open-source Syncthing engine

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited file sync | $4.99 | one-time |

**What reviewers like**

- ✅ Effective Syncthing implementation for iOS
- 💰 Fair one-time purchase model (no subscription)
- 🔒 Privacy-focused peer-to-peer syncing
- 📱 Good Files app integration
- ⚡ Fast file synchronization when working

**What reviewers complain about**

- 🐛 Outdated internal Syncthing version (1.28 vs 2.x)
- 💸 Aggressive paywall at 20MB free limit
- 🔌 No true background sync (iOS limitation)
- 🚫 Cannot sync iOS Photos app natively
- ⚠️ Inconsistent purchase restoration across devices

**Reported bugs**

- Syncthing version incompatibility with v2.x devices
- Device discovery limited to 1 of 5 paired devices
- Insufficient space errors despite available storage
- Purchase dialog rendering issues on older devices
- Purchase not persisting after app reinstall

**Requested features**

- Update internal Syncthing to version 2.x or higher
- iOS Photos app sync capability (at least one-way upload)
- True background synchronization
- Selective folder sync to save storage space
- File Provider extension for deeper iOS integration


## Frequently asked questions

### Is Not Emacs free?

Not Emacs is free to download, with no in-app purchases.

### Is Möbius Sync free?

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

### Which has better reviews, Not Emacs or Möbius Sync?

Not Emacs is rated higher. Not Emacs averages 4.0 out of 5 from 21 ratings, while Möbius Sync averages 3.8 from 140 ratings.

### Do Not Emacs or Möbius Sync have ads?

Neither Not Emacs nor Möbius Sync shows ads.

### Which is updated more often, Not Emacs or Möbius Sync?

Not Emacs ships an update every 2 weeks, and Möbius Sync every 2 months. Most recently, Not Emacs was updated on October 16, 2026 and Möbius Sync on October 21, 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.*