KOSHTER
Pick a client, add items from your price list, and KOSHTER builds an invoice, estimate, quotation or completion certificate as a PDF. No account. Everything stays on your phone.
Free · Android · via Google Play
We are recruiting testers for the Android version. Use KOSHTER for real work, share feedback and help us make the app better.
How to join
Join the RE:RISE testers Google Group with the same Google account you use in Google Play.
Join the groupOpen the Google Play testing page and tap “Become a tester”.
Confirm participationOnce confirmed, open Google Play and install the test version. Access may take a little while to appear.
Install the appYou need an Android phone and a Google account — the same one in all three steps. A test version may contain bugs.
Questions about testing
An Android phone and a Google account. Use the same account in all three steps: in the testers group, on the Google Play testing page and in Google Play on your phone.
Yes. Closed testing is free: you install KOSHTER from Google Play like any other app and get updates earlier. We don't promise paid perks for taking part — just early access and a say in how the app develops.
Yes, at any time. Open the testing page play.google.com/apps/testing/systems.rerise.koshter and leave the program, or leave the testers group. You can then uninstall the app or wait for the public version.
The developer can see the email address of the Google account you used to join the group and the test (it is shown in Google Play Console), plus any feedback you send. How the app handles data on your phone is described in its privacy policy.
During closed testing the app is available only to test participants. Make sure the group, the testing page and Google Play on your phone all use the same Google account, and give it a little time — access sometimes takes a while.
It is a test version, so bugs are possible. For important data make a backup or export if the app supports it.
Estimate. Invoice. Send.
KOSHTER works without sign-up or an account. Your business details, clients, price list, documents and costs are stored only on the device: there is no server of ours, no ads and no analytics. A document leaves the phone only when you share, print or save it yourself. You create backups yourself and can protect them with a password.
Privacy policyDeveloperRE:RISE systems · rerise.systems@gmail.com
Didn't find an answer? Write to us and we'll reply personally.
Tap Invoice, pick a client or add a new one, and add items from your price list or by hand. The total due stays on screen. Tap Issue and send: KOSHTER creates the PDF and opens the standard Android share menu, so you can send it by messenger or email, print it or save it to a file.
Invoices and estimates are free and unlimited, with no ads. KOSHTER Pro unlocks quotations, completion certificates, branded templates and profit analytics. It is a one-time purchase, not a subscription; Google Play shows the price in your currency.
No. KOSHTER is not a fiscal cash register, does not issue fiscal receipts and does not replace accounting. It creates invoices, estimates, quotations and completion certificates that you send to your clients.
Yes, with KOSHTER Pro. It includes the parties, place and date, the work done, the total, the amount in words and blank lines for signatures and names. It counts as signed only when you mark it so. You can create it from an invoice or estimate in the same order.
Yes. Documents, the price list and clients work without a connection. The internet is needed only by Google Play to buy or restore Pro, and by whichever app you use to send the file.
Only on your phone, in the app’s private storage. Android’s automatic cloud backup is turned off for KOSHTER. You create backups yourself and keep them wherever you like, for example Google Drive, optionally encrypted with a password.
Yes. A document can be issued in any of 8 languages: Ukrainian, English, Polish, German, Czech, Spanish, Italian or French. In settings you tick your currencies out of 22, and only those are offered in documents.
Yes. Internal costs and cost prices are stored for your own profit calculation. They are never added to the invoice total and never printed on the client’s document.
Ideas, partnership, beta testing — write to us and we will reply.
KOSHTERNow recruiting testersBecome a tester
