ConvertKit privacy policy
ConvertKit (package com.sumclartech.convertkit) is published by SumClarTech. Questions and privacy requests: Sumclartech@gmail.com. Last updated: 22 October 2026 (version 1.0.0).
Summary
ConvertKit converts units, currencies, cooking amounts, numbers and dates. The conversions run on your device. There is no account, no sign-in and no analytics SDK of ours. The app uses the internet in two ways only: to show ads, and, when you tap Refresh in the Currency tile, to download current exchange rates.
Data on your device
The app saves the following in its private app storage. It is never uploaded by the app.
- Your home screen choices: tile order, tile colours, light or dark theme.
- Your last unit and currency selections and the numbers you typed in those fields.
- Favourite conversion pairs and the History list (up to 200 results you chose to copy), including the text of each result and the time it was copied.
- Display settings: number of significant digits and thousands separators.
- Your list of currencies for the “Many at once” view.
- The last exchange-rate table you downloaded, so it works offline.
Anything you type into other tools (cooking amounts, recipe lines, dates, time zones, numbers) is used only to calculate the result on screen. It is not sent anywhere. Android backup is turned off for this app, so this data is not copied to Google Drive backups or to a new phone by the app.
Network use
| When | What is sent | To whom |
|---|---|---|
| You tap Refresh rates in the Currency tile (never automatically) | One HTTPS request to https://open.er-api.com/v6/latest/USD. It contains no account, identifier or personal data you entered. Like every web request it reveals your device's IP address and a user-agent text (“ConvertKit-Android/1.0”) to the server. | The free exchange-rate service by ExchangeRate-API (exchangerate-api.com), which handles requests under its own terms. |
| The home screen is shown (ads) | Ad requests and related data described under Advertising below. | Google AdMob. |
If you are offline, or the service does not answer, the app tells you and keeps showing the last rates it had, with their date. The rates that ship inside the app work with no network at all.
Advertising and consent
The app shows a banner ad on the home screen only, never inside the conversion tools. Ads are served by Google AdMob. Google may collect and use your device's advertising ID and other device identifiers, IP address, approximate location derived from it, ad and app interactions, and diagnostics, to serve and measure ads, prevent fraud and improve its services. Where the law requires it, the app asks for your consent through Google's User Messaging Platform before ads are requested, and you can change your choice later in the app (Customize, Ad privacy choices) when that option is offered. You can also reset or delete your advertising ID in Android settings (Settings, Privacy, Ads). See Google's advertising policies and privacy policy.
Retention and deletion
In the app, open the Saved tile: Settings has Clear favourites, History has Clear all. Uninstalling the app removes everything it stored on your device. We run no server that holds your data, so there is nothing for us to delete remotely. Data held by Google or ExchangeRate-API under their own policies is handled by them.
Permissions
- Internet: for the rates download you start with Refresh, and for ads.
- Network state: to tell you that you are offline instead of failing silently, and used by the ads software.
The app does not ask for your location, contacts, camera, microphone, photos, files, calendar, phone number or messages. Sharing the History list uses Android's normal share sheet; the text goes only to the app you choose. Copying uses the clipboard and sends nothing anywhere. The Google advertising software included in the app also declares some standard Android permissions (such as the advertising ID, wake lock and network state) that it needs to serve ads.
Security
Network requests use HTTPS. The app does not allow unencrypted (HTTP) connections. The rate download is size-limited and checked before use; invalid responses are ignored.
Children
ConvertKit is intended for a general adult audience and is not directed to children. We do not knowingly collect personal information from children.
Changes to this policy
If this policy changes, the new version will be published at the same address with a new date.
Contact
Questions or privacy requests: sumclartech@gmail.com.