Last Updated: September 25, 2026
This policy covers one app: Handyman Calc, the feet-and-inches construction calculator, on Android, iPhone and iPad. Our other apps are covered by the general Illumination Development privacy policy, which does not apply here. That policy describes accounts, reward balances and redemption records that this app does not have.
The short version
We never receive anything you calculate. There is no account and no sign-up. Every measurement you type, every estimate the app works out, every row in the Recent list and every set of numbers you save is written to storage on your device and stays there. There is no sync, no cloud backup of ours and no server holding a copy.
What does leave the device is advertising, anonymous usage analytics and crash reports, plus a support message if you choose to send one. Each is described in full below, along with how to limit it. This app sends more than some of our others do — it shows ads that can be personalized, and it keeps analytics — and we would rather say so plainly than describe it as sending nothing.
What stays on the device
The app keeps three local stores on the phone or tablet:
- Recent calculations — up to the fifty most recent, each one
holding what you asked (such as
12' 4 3/8" + 7' 9 1/2", or a slab's length, width and depth) and the answer that came back. - Saved numbers — the forms you chose to keep under a name with “Save these numbers”, up to twenty for each calculator, so a tap can refill them.
- Your settings — whether the keypad vibrates under your finger.
None of it is transmitted anywhere. There is no export and no profile. If the device backs itself up to iCloud or to Google, that copy is governed by Apple's or Google's terms and your own backup settings, and we have no access to it.
Copying a result puts it on your device's clipboard, and pasting a reading into a box uses the system's own paste. The app does not read the clipboard on its own.
You can delete a single Recent row by swiping it away, empty the list with Clear history, delete a saved set of numbers from its chip, or erase all three stores at once with Delete my data, described below. Because the copy on your device is the only copy there is, deleting the app removes it too.
What the app sends
None of what follows includes a measurement, an estimate or the name you gave a saved set of numbers. None of it includes your name or email address either, unless you type them into Contact support yourself.
An anonymous identifier
On first launch the app signs in anonymously to Google Firebase. This produces a random identifier for the installation — not a name, not an email address, not a phone number, and nothing you typed. There is no password and nothing to sign up for. It is used as the key for the installation's analytics and crash reports, and it is shown to you in Contact support (as “User ID”) so that a message you send us can be matched to the crash reports from the same device.
Usage analytics
The app reports a small set of events to Google Analytics: which screen is open, that a calculation was completed and which calculator it came from (the keypad, concrete, tile and so on), that history was cleared, that the privacy policy was opened, how long the app took to start, and when an error message was shown. It never reports what the calculation was — not the numbers, not the result.
Alongside those, Google Analytics collects its own app-instance identifier, coarse device information such as the model, the operating system version and the app version, and an approximate location that Google derives from the IP address. The app itself never asks for location permission. We use analytics to see which calculators are used and which are not, and for nothing else.
Crash and diagnostic reports
If the app crashes or hits a handled error, Google Crashlytics sends a report: the stack trace, the app version, the device model and operating system, and the anonymous identifier above. This is how bugs get found. Analytics and crash reporting are both switched off entirely in development builds.
Advertising
The app is free and carries advertising from Google AdMob and no one else. There are two placements: a banner, and an occasional full-screen advertisement after a calculation. The full-screen one is held back on purpose — never in the first six calculations after the app opens, never twice inside ninety seconds, and after that no more than once every fourth result. There are no rewarded advertisements and there is nothing to buy.
To serve advertisements, the Google Mobile Ads SDK contacts Google and may collect device and advertising information: an advertising identifier (Google's advertising ID on Android, and Apple's Identifier for Advertisers on iPhone and iPad if you allow it), device signals, an approximate location derived from the IP address, and the request, impression and click themselves. We never see this identifier, and it is not connected to anything you calculate.
Advertisements in this app can be personalized, where the law and your choices allow it. Unlike our games for children, this app is not child-directed and does not ask Google to switch personalization off; the choices below are how you limit it. Google's use of the information it collects is governed by Google's own privacy policy.
On iPhone and iPad: the tracking prompt
The app shows Apple's App Tracking Transparency prompt before any advertisement is requested. If you choose Ask App Not to Track, the app never receives Apple's Identifier for Advertisers and advertising continues without it. You can change your answer at any time under iOS Settings → Privacy & Security → Tracking.
On Android: the advertising ID
The app does not ask for any runtime permission. The advertising-ID permission is present, because the Google Mobile Ads SDK declares it, and it is used for advertising. You can reset or delete your advertising ID, or opt out of personalized ads, in your device's settings — on most phones, Settings → Privacy → Ads, or Settings → Google → Ads.
In the EEA, the UK and Switzerland
Where a consent regime applies, Google's consent message is shown before any advertisement is requested, and it asks for your choices about personalized advertising and the storing of and access to information on the device.
You can change your answer at any time — Settings → Ad privacy options reopens the same choices. That entry appears only where Google reports that a consent regime applies, which is why people elsewhere will not see it. Your consent decision is stored on your device by Google's consent SDK.
Contacting support
Settings → Contact support is the one place the app asks for anything about you. To send a message it needs your name, your email address, a topic and the message itself. Before you send, the form shows you exactly what else is attached, under “Included with your message”: the app name and version, your device's platform and operating system version, and the anonymous identifier described above.
All of that is delivered as an email to our support inbox, through a small Google Apps Script service that exists only to forward it, with your address set as the reply-to so that we can answer you. Your email address is used to reply to you and for nothing else.
The form is entirely optional. The app works fully without it, and if you never use it we never receive a name or an email address from you.
Delete my data
Settings → Delete my data does these things, immediately and without asking us:
- It deletes the anonymous Firebase identifier described above. The next time the app opens it signs in afresh and gets a new, unrelated one. This is the only step that needs a connection; if it cannot finish, nothing else is erased and the app says so, so you can try again.
- It permanently erases all three local stores — recent calculations, saved numbers and your settings.
- It resets the Google Analytics identifiers held on the device, so later analytics start from a new app-instance identifier.
Analytics events and crash reports already sent to Google before you pressed it are kept by Google under its own retention periods, keyed to identifiers that no longer lead back to this installation. If you want those looked at as well, write to privacy@illuminationdevelopment.com.
Support messages you have already sent are kept in our inbox, because an email that has been delivered cannot be recalled. You can ask us to delete them at the same address.
What the app does not do
- No account, sign-in, username or profile.
- No upload, sync or export of anything you calculate or save.
- No rewards, no coins, no in-app purchases and nothing for sale.
- No chat, no user-generated content shared with anyone, and no way to reach another person through the app.
- No location permission. The only location involved is the approximate one Google derives from the IP address, described above.
- No access to contacts, photos, files, camera, microphone, calendar or health data.
- No advertising network other than Google AdMob.
- We do not sell personal information. The advertising described above may count as sharing for cross-context behavioral advertising in the sense the CCPA and CPRA give that term; declining the tracking prompt, resetting or deleting your advertising ID, and opting out of personalized ads are how you limit it.
Children
Handyman Calc is a tool for construction and home-improvement work and is not directed at children. It is listed on Google Play for an audience of 18 and over, its advertising requests are not flagged as child-directed, and we do not knowingly collect personal information from anyone under 13. If you believe a child has sent us personal information through Contact support, write to privacy@illuminationdevelopment.com and we will delete it.
Your rights
Under the GDPR, the UK GDPR, the CCPA and CPRA, and comparable laws elsewhere, you have rights to access, correct, port and delete the personal information a company holds about you. The only things this app gives us that name you are the name and email address in a support message you chose to send; everything else is keyed to a random identifier. You can erase what is on the device yourself with Delete my data, and ask us about anything else — a support message, or data Google already holds — by writing to privacy@illuminationdevelopment.com.
Information held by Google from serving advertisements, running analytics and receiving crash reports is subject to Google's privacy policy and the controls described above.
A note about this web page
The app does not display this page — tapping Privacy Policy in Settings opens it in the device's browser, and this website uses Google Analytics to see which pages people find useful. That is described in the general policy, and it applies to your visit to this page, not to your use of the app.
Changes to this policy
If any of this stops being true, this page changes before the version that changes it reaches either store, and the App Store privacy label and Google Play Data safety form change with it. Revisions are posted here with an updated date.
Contact
Email: privacy@illuminationdevelopment.com
You can also reach us through our contact and support page.