Effective: 13 September 2026
Developer: Yashwant Singh · Contact: appmoodlens@gmail.com
MoodLens has no account and no servers, and it is built without the Android permission that would let it use the internet. Everything it records stays on your phone. We never receive, sell or share any of it — there is nothing for us to receive.
Your check-ins. The mood you pick, when you picked it, and the activity tag if you chose one.
Signal readings, only for the signals you switch on. When you check in, MoodLens saves a summary of what your phone was doing, so it can learn what tends to come before each mood:
App usage & screen time — how many minutes you have used your phone recently and late at night, and what share of that was in messaging and social apps or in video and news apps. The names of the apps you used are not saved.
Motion & activity — steps today, when the phone last moved, how long you have been moving, how much of that was walking, running or in a vehicle, and how much the phone shakes in your hand while the screen is on.
Notification activity — how often notifications arrive and how many get cleared. MoodLens never reads what a notification says, who sent it, or which app it came from.
Location (approximate) — your position rounded to an area about 550 metres across: a neighbourhood, not an address. The summary saved with a check-in is only how many different areas you have been in that day and how much of the day you spent in the main one.
To work out those summaries, MoodLens also keeps the current day's raw readings (step counter values, movement readings, activity labels and the approximate areas). These are deleted when the next day's first reading is taken.
What the forecast showed. When you check in, MoodLens notes what its mood forecast was showing at that moment and whether a reminder prompted the check-in, so it can measure how accurate it is.
The moods it predicted. Each time the forecast's predicted mood changes, MoodLens saves that mood and the time, so Trends can show your predicted moods the same way it shows your check-ins.
Your name and age, if you give them. Your name is what MoodLens calls you when it asks how you are feeling. Your age is only kept, to show back to you in Settings; MoodLens does not use it for forecasts. Both are optional, and you can change or clear either one in Settings at any time.
Your settings. Which signals and reminders are switched on, and which Android permissions MoodLens has already asked for.
Nowhere. MoodLens does not have Android's internet permission, so it cannot send anything off your phone. Its data is also excluded from Google's cloud backup.
Two things can move your data, and both happen only because you started them:
Export. "Export my data" in Settings saves a copy to a place you choose. Once saved, that file is yours — whoever can open that location can read it.
Moving to a new phone. Android's phone-to-phone transfer, which runs directly from your old phone to your new one when you set it up, can copy MoodLens's data across.
Google Play services. The motion signal uses Android's activity recognition, which Google Play services provides on your phone. MoodLens receives only the resulting activity label (for example "walking"). Google Play services is part of your phone and is covered by Google's own privacy policy.
MoodLens is a subscription sold through Google Play, with a free trial. Google Play handles the purchase, the trial and every renewal, and keeps the subscription with your Google account. MoodLens never sees your payment details. On your phone, MoodLens asks Google Play whether your account has an active subscription, and remembers when it last saw one, so that a short loss of connection doesn't lock you out. Google Play's handling of payments is covered by Google's own privacy policy. You can cancel any time in Google Play, under Payments & subscriptions.
Usage access — Screen time and the share of time in each kind of app
Physical activity — Steps and whether you are walking, running or in a vehicle
Approximate location — How many different areas you have been in today
Notification access — How often notifications arrive and get cleared — never their content
Notifications — To send check-in reminders
You choose the signals during setup: motion starts switched on and the other three start off, and you can change any of them — or skip the step, which leaves them all off. You can change them again at any time in Settings, and switching one off takes effect straight away. Nothing is read until Android has also granted the matching permission.
Switch a signal off in Settings. MoodLens stops reading it at once and deletes that signal's raw readings from the current day.
Switch reminders off in Settings.
Delete a single check-in from Trends. Its signal summary and forecast note are deleted with it.
Delete all data in Settings erases every check-in and everything saved with them, the saved predictions, and your name and age. Your other settings are kept.
Export a copy, and import it again later, from Settings.
If your subscription ends, MoodLens locks, but Export my data and Delete all data stay available on the lock screen.
Uninstall MoodLens, which removes everything it stored.
Check-ins, their signal summaries, forecast notes and saved predictions are kept until you delete them or uninstall the app. Raw readings are kept for the current day only.
MoodLens is not directed at children under 13.
MoodLens's forecasts and insights are estimates learned from your own check-ins. They are not a diagnosis or a substitute for professional care. If you are in crisis, contact your local emergency services.
If this policy changes, the new version will be published here with a new effective date.