Sensor Logger

Sensor Logger

Motion Logger with CSV Export

105 ratings
9 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • September 27, 2020
  • July 13, 2026

Features

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iphone
ipad
watch
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About

This app collects and displays data from various device sensors, including motion, GPS, and audio. It offers background recording, interactive plots, and multiple export formats. Advanced features allow for data streaming, systematic data collection from other users, and creating shareable data-driven dashboards.

One-tap logging
Background recording
Interactive plot visualization
Data streaming (HTTP/MQTT)
CSV, JSON, Excel, KML exports
Create and share data dashboards
Systematic data collection studies
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+1

What's New in Sensor Logger

1.61

July 13, 2026

- Introducing Backups - Allowing you to easily and automatically backup all your data seamlessly after each recording. - Easily access backup recordings with the Sensor Logger Cloud web portal, anywhere - Name and tags are also part of the backup, alongside sensor data. - Link multiple devices to the same Backup email to consolidate recordings made using multiple phones. You can also re-import recordings made from other devices locally. - To let everyone try out Backup, the Sensor Logger Cloud storage limits have been doubled for everyone with *no price changes*! These storage limits, as usual, are shared across all your Studies, Stories and Backup. So you can use them however you want depending on your needs! - Introducing audio recording on watches. - Works in standalone recording and in combined Phone + Watch recording modes. - Logs audio file and dBFS, like the already existing Microphone sensor on the phone. - Note that loudness values are streamed in realtime to the phone when in combined mode, but the recording itself is only transferred after the recording ends. - You can now see recording duration properly reported for standalone recordings from watches. - Added support for Bluetooth Cycling Speed and Cadence (CSC) sensors. Sensor Logger now records from any standard CSC device — speed-only, cadence-only, and combined speed+cadence units — including Garmin Speed 2 / Cadence 2, Wahoo RPM/SPEED, and equivalents. Speed and cadence are logged as separate data streams. - Fully support mDNS resolution for MQTT across various network setups and platforms. - Fixes a UTC / local date bug with recordings made with the watch. - Fixes a critical issue where WearOS was not streaming live data to the phone for HTTP or MQTT Push. - Behind the scenes upgrade and performance improvements. This includes the introduction of some Liquid Glass elements on the iOS. - Fixes a critical bug where renaming of a Study recording is not respected. - Sensor Zoo is now out of beta!

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Subscription plans

Pro Monthly

Unlock pro features, paid monthly

$9.991 Month
How to cancel Sensor Logger subscription ⁉️

User reviews

Concerning privacy practices

The app seems much better designed than many of the competing sensor apps available. That said, after trying it out, I’m not comfortable with it from a privacy perspective. It asks for permission for precise location and Motion & Fitness, even when you aren’t collecting that data. When you say no, it leaves bright yellow triangles on the screen, presumably intended to scare or annoy the user into granting permission. There is a privacy policy in the app, but it’s rendered in light grey text on a white background and is unreadable. The data this app collects is sensitive, so trust is critical, and I don’t feel like I can trust this app.
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Response from developer

Thanks for the feedback, the contrast on the privacy screen will be addressed in the next release. The permissions warnings are designed to indicate clearly which sensors may not be available for recording due to a lack of permissions (especially for reliably background recordings, which is a common use case for Sensor Logger), and are not intended to scare or annoy.

Geek’s delight, help for weather-sensitive pain

This app may be life-changing for me, more on that in a bit. First I have to say how pleasant it is to use. The UI is easy on the eyes, and the controls are fairly intuitive given how much functionality and flexibility it packs in. Just reading through the list of measurements that my iPhone can collect is already educational and fun. I’m making a list of people who I need to tell about this, they will love it!

But I’m not playing around, I’m on a mission. I have weather-sensitive fibromyalgia, and the science of how weather affects the health is not moving fast enough for me given how much I suffer day-to-day. I have been using an app that is useful for keeping charts of air pressure changes over time, but it has a conventional meteorological orientation. For starters, I live a little more than a mile above sea level and apps that insist on reporting my 830 mbar as 1030 mbar just… irritate me. More to the point, this app gives me total control over how frequently observations are collected. I’ve been using it for one day, and I’m already seeing patterns emerge that would never show up in the best data I could get before. (Not the ones I expected, but the ones that seem obvious in retrospect, which is always a good sign when you’re looking for answers.)
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Great app!

Very reliable. But for some reason I can not record motion data from AirPods. Can you look into this?

Stupid Units.

Logging the time in 1.69144E+18 is meaningless. Why can’t you just have the normal time, like 20:50:52 ? What is 1.69144E+18 supposed to mean ?

Great

Very helpful app for vehicle testing and analysis.

Developer apps

FAQ

What sensors does Sensor Logger collect data from?

Sensor Logger collects data from a wide range of sensors including accelerometer, gyroscope, GPS, audio, camera, and Bluetooth devices. It can also log device properties like screen brightness, battery, and network state.

Can Sensor Logger record data in the background?

Yes, Sensor Logger supports background recording. A single tap initiates the recording function, which continues even when the app is not actively open.

What export formats does Sensor Logger support?

Sensor Logger supports numerous export formats including Zipped CSV, JSON, Excel, KML, and SQLite. Paid tiers offer additional formats like Combined CSV.

How does Sensor Logger handle user data privacy?

Data collected by Sensor Logger stays on-device and is private by default. When using 'Studies', clear data usage descriptions and privacy statements are provided to participants.

What are the different paid tiers for Sensor Logger?

Sensor Logger offers 'Plus', 'Pro', and 'Ultimate' monthly and yearly subscription plans. These tiers unlock features like unlimited recordings, additional export formats, and enhanced cloud storage.

How often is Sensor Logger updated?

The latest version of Sensor Logger is 1.55, and it was last updated on March 23, 2026. This indicates a relatively active development cycle.

What is the age rating for Sensor Logger?

Sensor Logger has an age rating of 4+, making it suitable for a broad audience including children and adults.

Can I analyze my Sensor Logger data online?

Yes, you can create 'Stories' which are data-driven dashboards with your recordings, hosted online for effortless sharing and analysis.