What it does

Add a tank, then a parameter and a unit, such as pH or nitrate in ppm. Type the number from the test kit and choose the date. History lists the newer reading above the older ones. When two readings exist, the screen says the latest number is higher, lower, or the same as the one before it. A short line shows the last few values. Glaslog does not say the water is safe, and it does not tell you to change water, add a chemical, or move a fish.

Add a tank, then a parameter and a unit, such as pH or nitrate in ppm. Type the number from the test kit and choose the date. History lists the newer reading above the older ones. When two readings exist, the screen says the latest number is higher, lower, or the same as the one before it. A short line shows the last few values. Glaslog does not say the water is safe, and it does not tell you to change water, add a chemical, or move a fish.

One tank stays free, including the sample tank that opens with the app. Edit those example numbers or delete the tank. Deleted examples are not created again. A one-time purchase raises the limit from 1 tank to 6 and turns on CSV export. There is no subscription. Google Play shows the price at purchase.

One tank stays free, including the sample tank that opens with the app. Edit those example numbers or delete the tank. Deleted examples are not created again. A one-time purchase raises the limit from 1 tank to 6 and turns on CSV export. There is no subscription. Google Play shows the price at purchase.

Each tank can hold 12 parameters. Each parameter can hold 400 readings. A value can use up to 4 decimal places and cannot be negative. A date cannot be later than today or earlier than 1 January 2000. The app stores that date at noon in the phone's time zone.

Each tank can hold 12 parameters. Each parameter can hold 400 readings. A value can use up to 4 decimal places and cannot be negative. A date cannot be later than today or earlier than 1 January 2000. The app stores that date at noon in the phone's time zone.

Readings stay in a file on this phone. Uninstalling deletes the file. Another phone does not receive the old numbers. Restoring the purchase restores the extra tanks and CSV export, not the readings.

CSV columns are tank, parameter, unit, value, time, and note. Sharing uses the Android share sheet, and only after the purchase.

Internet is used for Google Play billing. Glaslog has no ads and no analytics SDK. It does not ask for location, camera, or contacts.

From the running app

When people use it

Internet is used for Google Play billing. Glaslog has no ads and no analytics SDK. It does not ask for location, camera, or contacts.
Glaslog is for someone who already uses a test kit and wants the new number next to the old one.

How a session works

Glaslog keeps the numbers you measure in an aquarium on this phone.

Add a tank, then a parameter and a unit, such as pH or nitrate in ppm. Type the number from the test kit and choose the date. History lists the newer reading above the older ones. When two readings exist, the screen says the latest number is higher, lower, or the same as the one before it. A short line shows the last few values. Glaslog does not say the water is safe, and it does not tell you to change water, add a chemical, or move a fish.

One tank stays free, including the sample tank that opens with the app. Edit those example numbers or delete the tank. Deleted examples are not created again. A one-time purchase raises the limit from 1 tank to 6 and turns on CSV export. There is no subscription. Google Play shows the price at purchase.

Each tank can hold 12 parameters. Each parameter can hold 400 readings. A value can use up to 4 decimal places and cannot be negative. A date cannot be later than today or earlier than 1 January 2000. The app stores that date at noon in the phone's time zone.

Questions

Does Glaslog say the water is safe?

No. It stores the number you type and says whether the latest number is higher, lower, or the same as the previous one. It does not tell you to change water, add a chemical, or move a fish.

Where are the readings stored?

In a local file on this phone. There is no account. A new phone does not receive the old readings. Uninstalling removes the file.

What is free?

One aquarium is free and keeps its history. There are no ads and no subscription. A one-time purchase raises the limit from 1 aquarium to 6 and adds CSV export. Google Play shows the price at purchase.

Does restoring a purchase restore my numbers?

A new phone can restore the purchase. It does not restore the readings, because they never left this phone.

What are the limits?

Each aquarium can hold 12 parameters. Each parameter can hold 400 readings. A value can have up to 4 decimal places and cannot be negative. A date cannot be after today or before 1 January 2000.