A SOFTWARE-COST CHECK FOR SOLO AND SMALL TEAMS

Should you pay forthat AI plan again?

It felt useful. That does not tell you whether it saved a monthly fee's worth of work. Software Proof Lab turns 30 days of use, time saved, and correction time into a keep-or-cancel decision.

Run the 3-minute estimate ↓

A person reviewing 30 days of AI usage on a paper calendar with a calculator — Review the 30-day record on the desk—not just the feeling that the plan was useful.

WHO THIS CHECK HELPS

You use AI for work and pay the monthly fee yourself

For solo operators and small teams who want clear keep-or-cancel conditions before the next renewal date.

You pay the AI subscription yourself
You can recall what you used it for
You want keep and cancel conditions before renewal

FREE · NO SIGN-UP

Start with a rough 30-day estimate

Enter the fee, use count, time saved, and correction time. The numbers stay in this browser.

Monthly feeValue of one hour of your timeUses in 30 daysMinutes saved per useMinutes spent checking and correcting per use

Enter all five numbers for a 30-day estimate.

This is a first-pass calculation, not a purchase recommendation. Check quality, safety, and alternatives before deciding. Entries are not sent or stored.

WHEN A ROUGH ESTIMATE IS NOT ENOUGH

Turn the feeling into a 30-day record

The free check is only a first pass. If you need a reusable work-by-work log, choose the JPY 200 article or USD 3 trilingual pack.

Check contents and price →

FREE TECHNICAL NOTES

Learn robotics and machine learning by running them

Step through A* path planning and k-means with interactive diagrams and compact Python samples.

Browse technical notes →