# Engbird vs Keya Authenticator

The clearest difference is in-app purchases: Engbird at none against Keya Authenticator's 3. Engbird also leads on device support (3 vs 1) and iOS requirement (12.0 vs 18.0). Keya Authenticator's advantage is update cadence (every 3 weeks vs every 6 weeks). On price and ads there is nothing between them.

Both are free to download. Keya Authenticator sells 3 one-off in-app purchases. Engbird asks for nothing beyond the download.

Engbird ships an update every 6 weeks, Keya Authenticator every 3 weeks. The most recent releases landed on October 20, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Engbird | Keya Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.8 (37 ratings)](https://appshunter.io/ios/app/engbird/id1282420032/reviews)** | — |
| Number of ratings | **37** | — |
| Positive reviews | 13.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 17 MB | 3 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Inkbird Technology Co. Ltd](https://appshunter.io/developer/1163595178) | [Eldar SHAIDULLIN](https://appshunter.io/developer/1894639063) |

## What reviewers say

### Engbird

[App page](https://appshunter.io/ios/app/engbird/id1282420032)

Monitor environmental conditions like temperature and humidity with smart sensors. View real-time and historical data, export it, and manage multiple devices and users. Supports various sampling intervals and multiple languages.

**Highlights:** Real-time temperature and humidity display, Configurable sampling intervals, Historical data viewing (day, week, month, year), CSV data export, Multi-sensor and multi-user support, Multi-language support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Works well
- 👍 Simple and easy to use
- 👍 Stores historical data
- 👍 Graphs temperature and humidity
- 👍 Bluetooth connectivity works well

**What reviewers complain about**

- 🐛 Crashes on launch after updates
- 🐛 Unreliable connection and data collection
- 🐛 Inaccurate temperature and humidity readings
- 🐛 Graphs and UI are difficult to use
- 🔋 Drains batteries quickly

**Reported bugs**

- App crashes on startup after updates
- Bluetooth connection issues, sensors not detected
- Temperature and humidity values displayed incorrectly
- Graph time scales do not match actual data
- Sensor names not displayed in app

**Requested features**

- Add push notifications for temperature/humidity alerts
- Improve graph functionality (zoom, customize, etc.)
- Allow calibration of temperature and humidity sensors
- Provide more detailed historical data export options
- Add support for multiple sensors/devices in one view


### Keya Authenticator

[App page](https://appshunter.io/ios/app/keya-authenticator/id6764358712)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee | $2.99 | one-time |
| Pizza | $9.99 | one-time |
| Family Dinner | $29.99 | one-time |


## Frequently asked questions

### Is Engbird free?

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

### Is Keya Authenticator free?

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

### Do Engbird or Keya Authenticator have ads?

Neither Engbird nor Keya Authenticator shows ads.

### Which is updated more often, Engbird or Keya Authenticator?

Engbird ships an update every 6 weeks, and Keya Authenticator every 3 weeks. Most recently, Engbird was updated on October 20, 2026 and Keya Authenticator on October 8, 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.*