# Outline App vs DuoIoT

The clearest difference is rating: DuoIoT at 5.0 against Outline App's 4.2. DuoIoT also leads on update cadence (weekly vs every 2 months) and iOS requirement (12.0 vs 15.5). Outline App's advantage is ratings volume (1.5K vs 1). 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.

DuoIoT holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Outline App has 1.5K ratings behind it against 1, so its average is the more settled of the two.

Outline App ships an update every 2 months, DuoIoT weekly. The most recent releases landed on October 27, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Outline App | DuoIoT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (1.5K ratings)](https://appshunter.io/ios/app/outline-app/id1356177741/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/duoiot/id6474174065/reviews)** |
| Number of ratings | **1.5K** | 1 |
| Positive reviews | 57.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free | Free |
| Size | 25 MB | 41 MB |
| Requires iOS | 15.5 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Outline Foundation](https://appshunter.io/developer/1876593185) | [Shenzhen Dualmi Technology Co., Ltd.](https://appshunter.io/developer/1719044980) |

## What reviewers say

### Outline App

[App page](https://appshunter.io/ios/app/outline-app/id1356177741)

Create and manage your own virtual private network (VPN) server for secure and private internet access. Share access with friends or colleagues by sending them an invitation directly from the manager. Enjoy fast, reliable, and encrypted connections to the open internet.

**Highlights:** Set up your own VPN server, Securely access the open internet, Keep communications private, Share access with trusted individuals, Fast and reliable connections, Strong encryption

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast and reliable
- 🔒 Secure and private
- 👍 Easy to set up and use
- 💡 Ability to create own VPN server

**What reviewers complain about**

- 🐛 Frequent connection issues
- 🔌 Unstable performance on mobile data
- 📉 Declining quality over time
- 🤖 Lack of customer support

**Reported bugs**

- App crashes after recent updates
- Unable to add new servers on iOS
- Connectivity problems in certain regions (e.g. Iran, China)

**Requested features**

- Add iOS widget support
- Improve UI/UX, especially on larger screens
- Provide more server location options
- Implement kill switch and split-tunneling features
- Add statistics and usage tracking


### DuoIoT

[App page](https://appshunter.io/ios/app/duoiot/id6474174065)

Real-time GPS tracking for vehicles, equipment, and assets. Monitor locations, review trip history, and set up custom alerts for important areas. Secure and reliable asset management.

**Highlights:** Real-time GPS tracking, Vehicle and equipment monitoring, Historical trip playback, Interactive map view, Geofence creation, Customizable alerts

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Outline App free?

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

### Is DuoIoT free?

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

### Which has better reviews, Outline App or DuoIoT?

DuoIoT is rated higher. Outline App averages 4.2 out of 5 from 1.5K ratings, while DuoIoT averages 5.0 from 1 ratings.

### Do Outline App or DuoIoT have ads?

Neither Outline App nor DuoIoT shows ads.

### Which is updated more often, Outline App or DuoIoT?

Outline App ships an update every 2 months, and DuoIoT weekly. Most recently, Outline App was updated on October 27, 2026 and DuoIoT on October 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*