DieselDocPro

Built from the ground up for diesel techs.

Get paid faster. Drop the paperwork. Run the whole business from your phone.

Name: DieselDoc Pro
Price: 59 USD
Author: Doug Alexander

Send an invoice and get paid however your customer likes — card, Venmo, Zelle, Cash App or cash. Run a card and it marks itself paid — money in your account, no chasing. Diagnose, find the exact part, schedule, customers, photos, and your books, all in one refreshingly simple app built for the folks still doing the work. No spreadsheets. No software you need a training class to figure out.

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Why I built this

I built this for the person doing the work — because I've been that person.

I've watched too many good, hard-working owners run their whole business out of their head and a notepad — not because they're behind, but because nobody ever built them software they could actually use, in their own language. The big companies had the money and the engineers, and they left these owners behind because there wasn't enough money in it for them.

You went all in on your dream. DieselDoc Pro gives you every tool to make it real — so you look like the pro you are, charge what you're worth, and run everything in your own language while every message to your customer goes out polished in theirs. Somebody should have built this for you years ago. Nobody did. So I did.

Everything I build comes down to one thing: helping the person doing the work get paid, get organized, and get home to their family. This one's for you.

— Doug Alexander, Founder

Your AI assistant

Just talk to your business — and it does the work.

Don't just ask — tell it what to do. "Book Rick a DPF cleaning for Tuesday." "Mark the Miller job paid." "Text my 2 o'clock that I'm running late." It books the job, updates your books, and sends the text — by voice or by typing, in your language. And it's not just commands: ask it anything. "What's the injector part number for a Cummins ISX15?" "Why's this DD15 down on power under load?" It's a master diesel tech in your pocket — and the more you use it, the more it learns how YOU work.

What your AI does

A master diesel tech — and your whole back office — in one.

The kind of thing no clipboard app gives you. Ask it anything about the work, or tell it to run the business — by voice or by typing, in your language.

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Ask it anything about the work

"Why's this DD15 down on power under load?" "This X15 keeps derating on a DEF fault — where do I start?" — get a straight answer like a master diesel tech: the likely cause, the fix, and the exact part.

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Find any part — instantly

Pick the truck — snap the ECM/component data plate — say the part, and get the exact OEM and aftermarket numbers, the price, where to buy, and whether it fits.

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Diagnose by symptom or fault code

Read it the dash code, an SPN/FMI fault, or an aftertreatment code — or just the symptom — and it walks the likely causes in order, then names the part you'll need.

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Run it all by voice, hands-free

"Book the Johnsons for a DPF cleaning Thursday." It books the job, prices it, and offers to text the customer — while your hands are full.

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It runs your office for you

"Make the Millers' invoice." "Who owes me money?" "Pull up that Peterbilt." Add customers, schedule, invoice, take payment — just ask.

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It learns how YOU work

Your go-to engines and parts, your pricing, your methods — tell it once and it remembers, getting sharper for you on every job.

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Works in your language

Ask it and it answers in your language — switch anytime. You work the way you talk.

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Knows your whole business

"What's due this week?" "How did I do this month?" It reads your jobs, money, and service-due list and just tells you.

Everything you need

One app for the whole job — minus the headache.

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Get paid the day you finish

Take card, Venmo, Zelle, Cash App or cash — however they want to pay. Run a card and the invoice marks itself paid, money straight to your bank. No more "I'll mail you a check."

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Pay over time on the big repairs

On a repair worth real money, "let me think about it" usually means "I can't pay that this month". Your customer can check their rate for monthly payments without touching their credit score — and you still get paid in full, next business day.

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Never miss a service

Log engine hours and the app flags every truck — and every APU — that's due for service, by hours or the calendar. PM intervals and DOT-inspection work that books itself.

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Every truck at your fingertips

Engine, VIN, ECM data plate, APU, gate codes, full service history — pull up any rig in two taps. You look like the pro you are.

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Proof on every job

Before/after photos and a pre-existing damage log — so a "you broke my truck" dispute never costs you a dime.

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Never lose a job to voicemail

Miss a call and the app texts them right back — so the job stays yours, not the next guy's.

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Talk to every customer in their language

You text in your language, they read it in theirs, and their reply comes back in yours. Every invoice, reminder, and text your customer gets is in their own language — 19 of them — with the dollars and dates always kept right.

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Bring your customers over in minutes

Switching software? Import your whole customer list from QuickBooks or a spreadsheet — names, phones, and addresses loaded at once. No retyping, no starting from scratch.

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Your crew trains itself — your way

Every crew member gets their own login with a master of the trade in their pocket — it welcomes a new hire, drills the safety rules, and answers every "how do I…" step by step, and teaches them the way YOU do it, because your own standards become its lessons. Stop losing whole days to training, and keep everyone safe around a hot DPF, high-pressure fuel, charged air systems and a raised cab. Your prices and payroll stay hidden — they get the mentor, you keep the business.

Everything it does

The whole shop — front of house to back of house.

Built specifically for mobile diesel repair. Here’s the complete picture of what runs on your phone.

Front of house — what your customer sees

Labor + parts estimates & quotes

Pick the truck and the services, add your hours at your shop rate, drop in parts and fees, and it builds a priced quote in seconds. Never underbid, never lose a job to a guess.

Get paid any way you want

Card, Venmo, Zelle, Cash App or cash — your customer’s choice. Run a card and the invoice marks itself paid, money straight to your bank the same day.

Deposits, trip/service-call fees & clean branded invoices

Missed-call text-back — the job stays yours

Auto-translated 2-way texting (your language ⇄ theirs)

One-tap Google review requests

Face-to-face voice translator — 19 languages

Your own booking link — they book themselves

Put one link in your Facebook page, your truck, your text signature. The customer picks the service, types their address, and it lands in your app as a lead — in their language. One tap turns it into a customer and a quote.

Every job ends in a 5-star review

Mark the job done and it texts the customer your Google review link — automatically, once, never nagging. It tracks who was asked and who actually left one. This is how a one-truck operation out-ranks the big company in town.

Memberships that bill themselves

Sell a prepaid plan — a block of visits, a yearly service package — and the dues run on schedule with the card on file. Predictable money in the slow months.

Tell them 8am and mean it

Put a real time on the appointment, not just a date. It shows on the day list in order, so you know what the morning actually looks like before you load up.

Talk to every customer in their language

Nineteen languages, built in. Their invoice, their texts, their booking page — in the language they actually read. You type English, they get theirs.

Back of house — what runs your business

AI Find-a-Part — the exact part number, instantly

Pick the truck — snap the ECM/component data plate and it reads make, model and serial — say the part, and it web-searches the exact OEM and aftermarket numbers, a rough price, where to buy, and quick install/torque notes. The kind of thing no clipboard app gives you.

AI Diagnose — by symptom or fault code

"Won’t start." "Down on power." "Keeps regenning." Or read it a dash code, an SPN/FMI, or an aftertreatment fault — it walks the likely causes and checks in order across the engine (Cummins X15, Detroit DD15, PACCAR MX), fuel and injectors, turbo and EGR, DPF/DEF aftertreatment, air brakes, electrical and cooling, then names the part you’ll need.

Your AI assistant — voice or text

A master diesel tech and your whole office in one: ask it anything about the work, or tell it to add a customer, book a job, invoice, and take payment — hands-free. It learns how YOU work.

Repair jobs & scheduling

Book jobs, pick the day, track them from quoted to done — your whole week at a glance.

Customer & truck profiles

Engine, VIN, ECM/component make/model/serial, APU hours, gate codes, full service history, photos — pull up any rig in two taps.

Engine-hours service tracking

Log engine hours and the app flags every truck — and every APU — that’s due for service, by hours or the calendar. PM intervals and DOT-inspection work that books itself.

Before/after photos + damage log

Proof on every job so a “you broke my truck” dispute never costs you a dime.

Money dashboard

See what’s paid vs still owed, your income, and how the month is going — at a glance.

Expense & parts/inventory tracking with low-stock alerts

Documents & insurance vault

Truck stop & fleet yard directory — gate codes & hours

Live local weather + 14-day forecast

Crew mode — assign jobs, see hours & status

Run it in English or Spanish — and reach customers in 19 languages

What you REALLY made on that job

Not just the invoice. Materials, your hours, the drive at the IRS mileage rate, and the card fee — subtracted. Most owners have never seen this number, and it is the one that tells you which customers are worth keeping.

QuickBooks, without the mess

Send your invoices, customers and payments straight to QuickBooks Online. Nothing ever comes back the other way — your app stays the boss and QuickBooks can never overwrite what you did in the field.

Hand your accountant a clean year

This year, last year, or everything — exported and emailed in one tap. No shoebox, no Sunday night with a calculator.

Proof it was already broken

Photograph the crack, the stain, the scrape that was already there BEFORE you start. Time-stamped, on the job, forever. The one time a customer blames you for damage you did not do, this is what ends the conversation.

Your crew clocks in where the work is

GPS-verified clock-in, timesheets that add themselves up, and hours that flow into what each job really cost you. No more guessing whether they were there at 7.

Run two trucks or five

Name your crews, hand a whole job to one of them, and each crew sees only their own route — nobody scrolls past work that is not theirs. You watch all of them on one live map, with hours and profit per crew.

It trains your new guy — your way

The master brain teaches the trade lesson by lesson, safety first. Then you add YOUR house rules — the way you do it, what you never skip, what you never do — and it teaches those as the way it is done here.

Nothing expires without warning

Your COI, your business license, your certifications — stored with their expiry dates, flagged before they lapse. Losing a commercial account over an expired certificate is a bad way to lose one.

Know what the work is going for

Anonymous pricing from real jobs across the trade, so you can see whether your number is low, high, or right — before you send it.

The shortest way around, rain or shine

It orders the day's stops from where you actually start, and when the weather turns it helps you move the job to the next dry day instead of losing it.

Parts and materials, counted

Point the camera at a bag or a box and it goes into inventory. Materials come off the shelf when you use them on a job, and land in that job's cost.

Break the language barrier

Talk to any customer or crew — in their language.

Lay your phone between you. Each person taps and talks — and it speaks the translation out loud, both ways. 19 languages, built right in. No more running the whole crew through the one bilingual guy.

Simple pricing