I Didn't Trust AI to Fill My Forms. Here's My First 72 Hours.

Why I Was the Last Person Who'd Trust AI With My Personal Info

I'm a career coach. I help people fill out job applications for a living. The idea of handing that over to AI felt like a dentist getting robot teeth.

I've watched clients struggle through Workday portals, manually re-entering their entire employment history for the fourth time that week. I've built spreadsheets to track which information goes where. I know every annoying date-picker format and every dropdown menu that refuses to accept "United States" when it wants "US." Forms are my territory. I know how they work, and I know how they break.

But after watching a colleague fill out 6 Workday applications in the time it took me to finish one, I had to know. She wasn't faster at typing. She wasn't skipping fields. She was using an AI form filler, and her screen moved like someone had hit fast-forward.

I gave myself 72 hours. If it felt wrong, I'd uninstall and go back to my spreadsheet system.

Day 1, Hour 0: Installation

First surprise: how little friction there was to start.

1. Clicked "Add to Chrome" from the Chrome Web Store. Took about 4 seconds.
2. Created an account with my Google login. Another 3 seconds.
3. Got dropped into a profile creation screen. This is where I'd enter the information I wanted Filliny to use when filling forms.

Free. No credit card. 5 fills to test. I wasn't committing to anything.

I spent about 4 minutes entering my work info. Name, address, phone, job title, LinkedIn URL. Standard stuff. Nothing I wouldn't put on a business card, which made me feel less nervous about trusting a new tool with it.

Something unexpected happened once my profile was set up. It felt like mine. Like a form-filling identity card I built. I'd put time into organizing my information in one place, and that small investment made me want to actually test it. I wasn't just evaluating software anymore. I was testing something I'd created.

Day 1: The First Real Test

I picked a Greenhouse job application because I know those forms inside and out. I've helped hundreds of clients fill them. I know which fields are required, which ones are tricky, and how the layout works.

Clicked the Filliny icon in my browser toolbar. Watched it scan the page. Then every field filled in about 3 seconds.

I sat there for a moment, then started checking each field one by one. First name, correct. Last name, correct. Email, phone, address, LinkedIn, all correct. It even got my current job title and company right.

Out of 15 fields, it got 14 right. It missed a "preferred start date" field and guessed January 2027. Not terrible, but I changed it to March. The fact it tried felt more human than I expected. A wrong guess is better than a blank field you forgot to fill.

14/15 fields correct = 93% accuracy on first attempt

That first fill used one of my 5 free credits. I still had 4 left and 71 hours on my self-imposed trial clock.

Day 2: The Job Application Marathon

This is where it got real. I decided to run Filliny through 5 different job applications in one sitting, each on a different platform. This is the kind of afternoon my clients dread, and honestly, so do I.

Here's what happened, platform by platform:

• Greenhouse: 15/16 fields filled correctly
• Lever: 12/12 fields filled correctly (perfect score)
• Workday: 18/20 fields filled (missed 2 custom dropdowns)
• WordPress custom form: 8/10 fields filled correctly
• Government portal: 11/14 fields filled (government forms are always weird)

Before Filliny, 5 applications like these would have taken me 2 to 3 hours. I've timed it with clients enough to know. Total time with Filliny: 22 minutes. That includes the time I spent reviewing and correcting the fields it missed.

22 minutes for 5 job applications. I've spent longer deciding what to order for lunch.

The Lever result surprised me the most. Perfect fill on all 12 fields. I double-checked twice because I didn't believe it. Lever forms tend to have clean, predictable field names, which probably helps the AI match them correctly.

Day 2: Where It Stumbled (Honest Assessment)

I promised myself I'd be honest about this, so here is what did not work perfectly.

• Custom dropdown menus sometimes needed manual selection. The AI would identify the right field but not always pick the correct option from a non-standard dropdown.
• A "Why are you interested in this role?" field generated generic text. It was grammatically fine but sounded like a template. I rewrote it in about 90 seconds.
• One government form had a CAPTCHA-like field arrangement that confused it. Fields were laid out in a grid pattern with no clear labels, and the AI could not map them correctly.
• Workday's custom dropdown for "How did you hear about us?" was left blank both times I tested.

These are not dealbreakers. They are the 5% you handle manually while the other 95% takes care of itself. I still saved over two hours in a single afternoon, even with the corrections.

The generic cover letter text actually made me think. I don't want AI writing my cover letter. That should be personal. But I do want AI filling in my address, phone number, and job history. There is a clear line between data entry and personal expression, and Filliny handles the data entry side well.

Day 3: Beyond Job Applications

By the third day, I wanted to see how Filliny handled forms outside of job applications. Job boards are one thing. Real-world forms are another.

I tested three scenarios:

An insurance quote form asked for 23 fields. Name, address, vehicle info, coverage preferences. Filliny handled the personal information fields in under 10 seconds. I still had to enter vehicle-specific details manually, but the personal data portion, which is usually the tedious part, was done before I finished reading the page header.

An online checkout form was almost instant. Name, shipping address, email, phone. Four clicks and done. I've typed my address into checkout forms thousands of times. Having it appear automatically felt like a small luxury.

An account registration for a new software tool needed email, name, and company details. Filled in 2 seconds. I spent more time choosing a password than Filliny spent filling the rest of the form.

By day 3, I caught myself getting annoyed at the ONE form I had to fill manually because it used an embedded iframe that the extension could not reach. That reaction told me something. In 72 hours, my baseline expectation had shifted. Manual form filling went from "how things work" to "why isn't this automatic?"

The Numbers After 72 Hours

Here is the honest scorecard from three days of testing:

1. Forms filled: 14
2. Total time spent (including corrections): 47 minutes
3. Estimated manual time for same forms: 4+ hours
4. Overall accuracy rate: 91% of fields correct on first fill
5. Fields I corrected manually: ~12 out of ~180
6. Money spent: $0 (used free tier for first 5, then upgraded)

The time comparison is what convinced me. 4 hours down to 47 minutes. That is not a marginal improvement. That is getting an afternoon back.

I want to be clear about what that 91% accuracy means in practice. Out of roughly 180 fields across 14 forms, about 12 needed manual correction. Most corrections were small: a dropdown selection, a date format, one generic text response. None required re-entering large blocks of data. The time I spent correcting was measured in seconds per field, not minutes.

Who Should Try This (And Who Probably Shouldn't)

After three days of real-world testing, I have a pretty clear picture of who benefits most from an AI form filler:

• Job seekers applying to 5+ positions per week
• Freelancers juggling client onboarding forms
• Anyone who fills more than 10 forms per month
• People who are tired of retyping the same info across different sites
• People who fill 1-2 forms per month (the free tier handles this fine, but you might not notice the difference)

The job seeker use case is where this really shines. When you are applying to 20 or 30 positions a week, form filling is not just annoying. It is a bottleneck that slows down your entire search. Removing that bottleneck means you can spend more time on the parts that actually matter: tailoring your resume, researching companies, and preparing for interviews.

My Honest Take After 72 Hours

I went in expecting to write a takedown. I wanted to find all the reasons why AI form filling was a gimmick, why it would never match the accuracy of doing it yourself, why the technology was not ready.

Three days later I upgraded to Pro. Not because the free tier was not enough for a fair test. Because 5 fills ran out faster than I expected, and I was not going back to manual. The speed difference is too significant to ignore once you experience it.

Is it perfect? No. That 91% accuracy means you still review every form before submitting. You should be doing that anyway, even when you fill forms manually. The difference is that reviewing pre-filled fields takes 30 seconds. Filling them from scratch takes 15 minutes.

Install Filliny and see for yourself. The free tier gives you 5 fills with zero commitment. If you end up filling more than 10 forms a month, the Pro plan removes the limit entirely.

The 72-hour skeptic became a paying customer. Do with that what you will.