MediumMobile AppLocalClear niche and buyerA computer or phone that can run the model locallyPayments via RevenueCat

Verified

Offline Phone PDF App With an On-Device AI Chat

Merge, split, compress, sign and scan PDFs on your phone with nothing uploaded, plus an AI chat that runs on the device after a one-time model download.

In plain English

ProperPDF is a phone app that merges, splits, compresses, signs and scans PDF files without uploading them anywhere. It also has an AI chat that runs on the phone itself after downloading its model once. People use it for private papers like tax forms and contracts. Developer Chiranjeevi Pandey sells Pro as a one-time $29.99 unlock or a subscription.

Automation90%

Startup costNot disclosed

Time to first $Not disclosed

Monthly range*$18 MRR

~$18 MRR; $16 last 30 days; $336 all-time (TrustMRR/RevenueCat, Nov 10, 2026)

DifficultyMedium

SourceTrustMRR - ProperPDF ↗

Operator: Chiranjeevi Pandey (developer)

Verified

Revenue independently checked: documents reviewed by a publication, or a public dashboard.

TrustMRR RevenueCat-verified (~$18 MRR, $16 last 30 days, $336 all time, 3 subscriptions; checked Nov 10, 2026) ↗

Not disclosed.

The tool stack

RevenueCat ↗

Free up to $2.5k MTR

Mobile subscriptions

App Store ↗

$99/yr

iOS distribution

Core ML ↗

Free with Xcode

On-device model inference

Prices are the vendors' published list prices as researched in Oct 2026 and change often — always check the vendor's pricing page.

Step-by-step setup

Build common PDF tools that work fully on the phone.
Add a small AI chat model that runs on the device.
Free basic tools, with a one-time or monthly Pro unlock.
Grow through privacy-focused search and app store reviews.

What's automated vs. the human 10%

The machine does

Core AI generation/analysis
Billing and onboarding

You still do

Product quality and support
Distribution and marketing
Compliance and edge cases

Overview

Merge, split, compress, sign and scan PDFs on your phone with nothing uploaded, plus an AI chat that runs on the device after a one-time model download.

Operator: Chiranjeevi Pandey (developer). Website: https://tryproperpdf.app/

Estimated split: about 90% of the work automated, 10% human.

Realistic income

TrustMRR (checked Nov 10, 2026) shows about $18 MRR, $16 in RevenueCat-verified revenue over the last 30 days and $336 over its tracked history, with 3 active subscriptions. This is one operator’s result, often after months or years of work, and doesn’t predict yours. Check the live listing — numbers change.

Risks

Verified sales are still small (a few hundred dollars).
Free PDF tools are everywhere, so privacy is the main reason to pay.
On-device AI is slower and weaker on older phones.
Startup cost and time to first dollar are not disclosed.

*Income figures are illustrative ranges based on public pricing and typical outcomes reported by practitioners, not guarantees. Most new online businesses earn little or nothing at first. Not financial, legal or tax advice.