# Nightdraft: Whole House Fan — Local Control & Sleep Timer

> Mobile interface for whole-house fan controllers with real-time data and smart efficiency suggestions. (iPhone/iPad app by Gregory M Koch.)

- Source: https://appshunter.io/ios/app/nightdraft-whole-house-fan/id6802117751 (this page in markdown: same URL + `.md`)
- Developer: [Gregory M Koch](https://appshunter.io/developer/6792192088)
- Category: Utilities
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-08-19
- Data updated: 2026-09-18
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/nightdraft-whole-house-fan/id6802117751/reviews.md

## What is Nightdraft?

Nightdraft puts your whole-house ventilation fan on your phone, as an instrument panel rather than a web page nobody wants to open.

Speed, airflow, power draw, run timer, and indoor, outdoor and attic temperatures, all on one screen. Speed up, slow down, stop, or add time to the timer with a tap. It refreshes on its own every thirty seconds, so what you're looking at is current.

IS IT EVEN WORTH RUNNING?

A whole-house fan pulls outside air in, so it only cools when it's genuinely cooler out there. Instead of showing you two temperatures to compare in your head, the app reads the difference and tells you: good time to run, marginal gain, or it would warm the house. It makes the same call for your attic, which the fan flushes through the roof vents — worth doing on an evening when the indoor gain is marginal, because a hot attic radiates down through the ceiling for hours.

BUILT FOR A DEVICE ON YOUR OWN NETWORK

• Talks directly to your controller over your home Wi-Fi. No account, no cloud service, no relay in the middle.
• An unreachable controller is never shown as a fan that's switched off. If the app can't reach it, it says so. 
• Missing sensors are shown as missing, not guessed at. If your unit shipped without an outdoor probe, you can optionally fill that channel from a weather service — and readings from it are labelled, because a regional forecast is weaker evidence than a probe at your house. 
• No analytics, no tracking, no advertising, no third-party code of any kind.

Requires a whole-house fan controller with the AirScape-style local HTTP interface, reachable on your home network. Nightdraft is an independent app and is not affiliated with or endorsed by any fan manufacturer.

Weather data by Open-Meteo.com.

## Key features

- Real-time fan monitoring
- Speed and airflow control
- Run timer management
- Intelligent efficiency recommendations
- Indoor, outdoor, and attic temperature display
- Direct local network connection


## Frequently asked questions about Nightdraft

### What is Nightdraft?

Nightdraft is a mobile application designed to provide direct control and monitoring for compatible whole-house fan controllers. It offers a user-friendly interface to manage fan speed, timer, and view real-time temperature data.

### Does Nightdraft have ads?

No, Nightdraft is completely ad-free. The app is developed with no advertising, tracking, or third-party code, ensuring a clean and uninterrupted user experience.

### How does Nightdraft determine if it's worth running the fan?

Nightdraft analyzes indoor, outdoor, and attic temperatures to provide smart recommendations. It calculates the temperature difference to advise if running the fan will effectively cool the house or attic.

### What devices does Nightdraft support?

Nightdraft is currently supported on iPhones. It requires a whole-house fan controller with an AirScape-style local HTTP interface that is reachable on your home network.

### How often does Nightdraft update its data?

The app refreshes its data automatically every thirty seconds, ensuring that the displayed information regarding fan status and temperatures is current.

### Can I use Nightdraft without an internet connection?

Nightdraft talks directly to your controller over your home Wi-Fi network. It does not require an account, cloud service, or an internet connection to function, as long as your device and controller are on the same local network.

### What is the rating for Nightdraft?

Nightdraft has a perfect rating of 5.0 stars from 1 rating, indicating high user satisfaction among its current users.

### Is Nightdraft affiliated with fan manufacturers?

No, Nightdraft is an independent application and is not affiliated with or endorsed by any fan manufacturer. It is designed to work with specific types of whole-house fan controllers.

## Version history (last 5 releases)

### 1.2.4 — 2026-09-17

The app icon now has a distinct dark appearance, so the home screen's light/dark switch is visible on it. Nothing about the panel has changed.

### 1.2.3 — 2026-09-10

The App Store screenshots have been refreshed. Nothing about the panel has changed.

### 1.2.2 — 2026-09-08

Nightdraft no longer crashes when a controller or the weather service sends a temperature that can't be real. Readings still appear exactly as reported, but the "worth running?" and "attic worth flushing?" verdicts now stay quiet rather than judge from a number no thermometer could produce.

Find My Controller is more honest about why it found nothing. If your phone has just dropped off Wi-Fi it now says so, instead of asking you to grant a permission you already gave, and a device on your network that answers slowly can no longer leave the search stuck short of finishing.

Siri and Shortcuts get their verdict more reliably. If the app is already fetching the outdoor temperature when a shortcut asks, the shortcut now waits for that answer instead of reporting that no verdict is available. The outdoor reading also recovers promptly after the app is closed mid-fetch, and after a clock change on your phone.

For VoiceOver on the Reactor themes, the RUNNING lamp says "unknown" rather than "off" before the controller has answered, and every lamp offers a Refresh action, so the panel can be refreshed without pull-to-refresh. At the largest text sizes the shutoff clock no longer wraps and nudges the controls. Coordinates typed with a comma decimal are accepted in Settings, and the controls no longer stay dimmed after switching back to the app mid-request.

### 1.2.1 — 2026-09-02

The Add Time button no longer guesses. Your controller doesn't publish how much time that button adds, so Nightdraft works it out by watching what happens — and it used to put a number on the button after a single press, which could be a minute out. It now stays on the plain "Add Time" until it has seen enough to be sure, and only then tells you the amount.

Asking Siri to add time to a fan that isn't running now tells you the fan is stopped, instead of sending a command with no defined effect. Every panel already greyed that button out; the voice path now agrees with it.

On the Reactor themes, a temperature with no sensor reads as a plain dash instead of a dash with a degree sign attached. Airflow, power and the temperatures animate between readings again, the way the speed number always has. And while sample data is switched on, the Settings screen now says so above the controller details, so a demo reading can't be mistaken for your fan's.

Nightdraft also no longer follows a redirect away from the address you entered — a reply can only come from the controller you pointed it at — and cancelling a network search before starting another no longer disturbs the second one.

### 1.2 — 2026-08-29

Nightdraft can now find your fan controller for you. Tap Find My Controller in Settings and it sweeps your Wi-Fi network for anything that answers like a controller, then shows you the model and software version so you can tell two apart before you adopt one. You can still type an address by hand; you just don't have to go looking for it first.

Setting up for the first time is clearer. A fresh install no longer starts on a panel full of dashes pointed at an address that was never yours — it says plainly that no controller is set up yet, and offers you the two ways forward: find it on your network, or look around with sample data. iOS asks for local-network permission up front, at the point it makes sense, instead of after a search has already silently failed.

## More apps by Gregory M Koch

- [Between Us: Intimacy Checklist](https://appshunter.io/ios/app/between-us-intimacy-checklist/id6792191966)
- [HippoChomp: Toddler Game](https://appshunter.io/ios/app/hippochomp-toddler-game/id6806156933)

All apps by Gregory M Koch: https://appshunter.io/developer/6792192088

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-18.*