# AC Infinity vs Terrestream

The clearest difference is rating: Terrestream at 5.0 against AC Infinity's 4.2. Terrestream also leads on update cadence (every 3 days vs monthly). AC Infinity's advantage is ratings volume (859 vs 1) and iOS requirement (15.0 vs 18.0). 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.

Terrestream holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: AC Infinity has 859 ratings behind it against 1, so its average is the more settled of the two.

AC Infinity ships an update monthly, Terrestream every 3 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | AC Infinity | Terrestream |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (859 ratings)](https://appshunter.io/ios/app/ac-infinity/id1481751004/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/terrestream/id6751147871/reviews)** |
| Number of ratings | **859** | 1 |
| Positive reviews | 79.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | Free | Free |
| Size | 377 MB | 19 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPod | **iPhone, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [AC Infinity](https://appshunter.io/developer/1481751003) | [Terrestream](https://appshunter.io/developer/1833687298) |

## What reviewers say

### AC Infinity

[App page](https://appshunter.io/ios/app/ac-infinity/id1481751004)

Control and monitor your smart ventilation systems for HVAC or grow projects. Access advanced programming, track environmental data like temperature and humidity, and receive customizable alerts. Seamlessly pair with compatible devices for comprehensive environmental management.

**Highlights:** Advanced programming (timers, schedules, triggers), Real-time temperature and humidity monitoring, Customizable alarms and push notifications, Data logging and export, Wireless control of fan settings, Scheduled fan automation

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

**In-app purchases:** none

**What reviewers like**

- 👍 Convenient and easy to use
- 🚀 Powerful automation and control
- 💡 Excellent app functionality
- 🔍 Detailed monitoring and data tracking
- 🤖 Impressive AI-powered features

**What reviewers complain about**

- 🐛 Connectivity issues after updates
- ⚠️ Unstable settings changes
- 🕰️ Slow app performance
- 🤔 Confusing user interface
- 🔌 Bluetooth-only connectivity limitations

**Reported bugs**

- App crashes after firmware updates
- Devices randomly disconnecting from app
- Incorrect data reporting on the app
- Automation settings being reset unexpectedly

**Requested features**

- Add Wi-Fi connectivity for remote control
- Improve data visualization and graphing
- Implement more advanced automation options
- Allow custom fan speed and light intensity control
- Add support for day/night mode settings


### Terrestream

[App page](https://appshunter.io/ios/app/terrestream/id6751147871)

Monitor your home's indoor air quality and receive actionable guidance. Understand how outdoor conditions impact your air and make informed decisions about ventilation and filtration.

**Highlights:** Real-time indoor air quality readings, Outdoor condition integration, Actionable ventilation guidance, Home screen widgets, Apple Watch companion app, Historical air quality data, Notification history

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is AC Infinity free?

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

### Is Terrestream free?

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

### Which has better reviews, AC Infinity or Terrestream?

Terrestream is rated higher. AC Infinity averages 4.2 out of 5 from 859 ratings, while Terrestream averages 5.0 from 1 ratings.

### Do AC Infinity or Terrestream have ads?

Neither AC Infinity nor Terrestream shows ads.

### Which is updated more often, AC Infinity or Terrestream?

AC Infinity ships an update monthly, and Terrestream every 3 days. Most recently, AC Infinity was updated on November 3, 2026 and Terrestream on October 30, 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.*