# PrintDoctor: Receipt Printer — Test & fix ESC/POS printers

> Test & fix ESC/POS printers (iPhone/iPad app by Marcus Lam.)

- Source: https://appshunter.io/ios/app/printdoctor-receipt-printer/id6788153543 (this page in markdown: same URL + `.md`)
- Developer: [Marcus Lam](https://appshunter.io/developer/1477751548)
- Category: Utilities
- Price: $14.99
- Age rating: 4+
- Requires: iOS 16.4 · 33 MB
- Languages: American English
- Released: 2026-07-17
- Data updated: 2026-08-18
- User reviews in markdown: https://appshunter.io/ios/app/printdoctor-receipt-printer/id6788153543/reviews.md

## What is PrintDoctor?

The field toolbox for ESC/POS thermal receipt printers. Find, test, and fix any network receipt printer from your phone - no laptop, no vendor utility, no guesswork.

Built for POS technicians, systems integrators, and shop owners who just want the receipt printer to work.

FIND YOUR PRINTER
- Scan your WiFi network and find every printer listening on port 9100 in seconds
- Save printer profiles (name, IP, paper width) for one-tap access
- Works with any ESC/POS printer with a LAN or WiFi interface - Epson, Star, Xprinter, GOOJPRT, Rongta, MUNBYN, and the generic ones

TEST IT
- One-tap test pages: status page, font & style matrix, barcode + QR sample, 58/80mm ruler
- See exactly what your printer can do before you wire it into a POS

FIX GARBLED RECEIPTS (the killer feature)
- Chinese, accents, or symbols printing as garbage? The Codepage Matrix prints the same sample line under every common ESC/POS codepage - including Big5, GB18030, and UTF-8 modes - each one labelled
- Find the row that prints correctly, set that codepage in your POS software, done

CASH DRAWER
- Fire the drawer kick on pin 2 or pin 5 with selectable pulse widths
- Built-in wiring explainer (RJ11/RJ12) for drawer installs

PRINT LOGOS
- Pick any image, preview it in true 1-bit with three dithering algorithms (Floyd-Steinberg, Bayer, threshold), and print it as a raster logo

TRY EVERYTHING WITHOUT A PRINTER
- The built-in Virtual Demo Printer renders every print job as an on-screen receipt - test the whole app before you're even on site

HONEST BY DESIGN
- One-time purchase. No subscription, no watermarks, no print limits, no ads, no account
- Fully offline: the app talks only to printers on YOUR network, nothing else
- iPhone can't speak classic-Bluetooth SPP, so PrintDoctor doesn't pretend to - network printing done right, with a clear in-app explanation

Support: https://lampstandtech.com/printdoctor/support
Privacy: https://lampstandtech.com/printdoctor/privacy


## Version history (last 1 release)

### 1.0 — 2026-07-18

No release notes.

## More apps by Marcus Lam

- [Yes Or No Coin](https://appshunter.io/ios/app/yes-or-no-coin/id1481428804)
- [Train Infinite](https://appshunter.io/ios/app/train-infinite/id1498963948)
- [Dad Is Running](https://appshunter.io/ios/app/dad-is-running/id1503983992)
- [ImageCal: Photo to Calendar](https://appshunter.io/ios/app/imagecal-photo-to-calendar/id6751468408)
- [Space Sandbox](https://appshunter.io/ios/app/space-sandbox/id6758065635)
- [Ringly AI Phone Assistant](https://appshunter.io/ios/app/ringly-ai-phone-assistant/id6782955296)

All apps by Marcus Lam: https://appshunter.io/developer/1477751548

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-18.*