# Synology MailPlus vs Instant Guard

The clearest difference is rating: Synology MailPlus at 3.8 against Instant Guard's 3.4. Instant Guard's advantage is ratings volume (61 vs 19) and iOS requirement (13.0 vs 17.0). On price, review sentiment, update cadence and ads there is nothing between them.

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

Synology MailPlus holds the better App Store score, 3.8 against 3.4. Both are backed by a comparable volume of ratings — 19 and 61 respectively. Written reviews point the same way: 43% of Synology MailPlus's written reviews are positive against 39% of Instant Guard's.

Synology MailPlus ships an update every 4 months, Instant Guard every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Synology MailPlus | Instant Guard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (19 ratings)](https://appshunter.io/ios/app/synology-mailplus/id967913737/reviews)** | [3.4 (61 ratings)](https://appshunter.io/ios/app/instant-guard/id1522843324/reviews) |
| Number of ratings | 19 | **61** |
| Positive reviews | **42.5% of reviews** | 39.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 100 MB | 64 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Synology Inc.](https://appshunter.io/developer/321493109) | [ASUS](https://appshunter.io/developer/527118677) |

## What reviewers say

### Synology MailPlus

[App page](https://appshunter.io/ios/app/synology-mailplus/id967913737)

Manage your emails efficiently on mobile with intuitive swipe gestures and quick-reply templates. Organize messages, attach files, and search with advanced features. Requires a Synology NAS and MailPlus server.

**Highlights:** Swipe gestures for quick actions, Quick-reply templates, Compose and attach files, Create mailboxes and labels, Advanced search, Offline cache for attachments, Customizable unread badge

**Features:** Vision Pro support

**In-app purchases:** none


### Instant Guard

[App page](https://appshunter.io/ios/app/instant-guard/id1522843324)

This app provides a secure VPN connection, allowing you to browse anonymously and protect your financial information on public Wi-Fi. It enables remote access to your home ASUS router, ensuring your privacy and security wherever you go.

**Highlights:** One-click VPN connection, Secured and encrypted connectivity, Anonymous browsing, Change IP address and location, Remote ASUS router access

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and does its job
- 🔒 Great security focused VPN
- 👍 Setup is straightforward
- 💰 Cost-effective solution
- 🚀 Works great for remote access

**What reviewers complain about**

- 🐛 Auto connection conflicts
- 🐛 Fails to connect on iOS update
- 🐛 Cellular data severely affected
- 🐛 No internet when connected
- 🐛 Auto protect on cellular

**Reported bugs**

- Auto connection still conflicts
- Cannot connect after current iOS update
- Cellular data severely affected
- Auto protect feature comes on when on cellular network
- IP Address did not change

**Requested features**

- Add split tunnelling
- Automatic connection when leaving home network
- Ability to automatically connect/disconnect based on WiFi network
- Shortcuts widget for one-touch control
- Automation capabilities


## Frequently asked questions

### Is Synology MailPlus free?

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

### Is Instant Guard free?

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

### Which has better reviews, Synology MailPlus or Instant Guard?

Synology MailPlus is rated higher. Synology MailPlus averages 3.8 out of 5 from 19 ratings, while Instant Guard averages 3.4 from 61 ratings.

### Do Synology MailPlus or Instant Guard have ads?

Neither Synology MailPlus nor Instant Guard shows ads.

### Which is updated more often, Synology MailPlus or Instant Guard?

Synology MailPlus ships an update every 4 months, and Instant Guard every 2 months. Most recently, Synology MailPlus was updated on October 24, 2026 and Instant Guard on October 24, 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.*