UUNA TEK iAuto review: a handwriting robot that feeds its own paper

What is it?

Most pen plotters draw one sheet at a time: you tape paper down, plot, swap. The iAuto adds an automatic paper feeder, so it can work through a stack of letters or envelopes on its own. UUNA TEK aims it at marketing agencies, wedding planners, non-profits and anyone who sends handwritten mail in volume.

The Standard model costs $2,799 on the official store (list $3,999); the Advanced model $2,939.

Technical overview

• Capacity: up to 80 letters or 30 envelopes per load.
• Paper: any size up to A3.
• Pens: up to 18 mm wide, so most ballpoints, gel pens and markers fit.
• Software: a free app for Windows (x64 and Arm) and macOS, with five modes (Table, Simple Note, Character, SVG and Drawing Board) and a Windows Font Creator.
• Connectivity: USB and Wi-Fi, plus an HTTP API.

Setup

CNX Software’s reviewer described setup as easy: a roughly 390 MB software download (driver included), Wi-Fi configured over USB, and a “Change Pen” routine where the pen tip should lightly touch the bed. Full features need a free account registration.

Writing tests

The most detailed hands-on review we found is CNX Software’s (October 2026):

• Handwritten text in blue ballpoint on 80 gsm paper at default settings: the reviewer was very satisfied.
• Wikipedia text in multiple handwriting fonts: described as very impressive.
• Small text: legible down to size 20; at size 10 the lines merged.
• Speed presets: from High Quality to Ultrafast, with no visible quality difference in their tests.
• Envelopes (10.8 × 23.4 cm) worked with mail merge. Envelopes fed the wrong way round wrinkled.
• Pens and paper: ballpoint, gel, acrylic brush, acrylic paint and fine-tip marker on 80, 110, 160 and 200 gsm paper. Heavy paper was no problem; wet pens made the paper shift and smear on graphics.

Drawing tests

This is where the iAuto is weaker. A floor-plan SVG came out with missing lines and misplaced dimension lines, and a Wikimedia SVG had shifted elements. Paper size also reset on every SVG import. For artwork, a dedicated plotter like the iDraw H A3 is the better tool.

Automation

The HTTP API (log in, check machine status, send SVG) worked from Postman, which opens the door to connecting a CRM or order system. The reviewer found the documentation thin.

What testers complain about

• A steep learning curve in the interface.
• Wet ink transferring to the rollers.
• Wrinkled envelopes when fed incorrectly.
• Thin API documentation.

iAuto vs the alternatives

• vs UUNA TEK iDraw H A3 ($559): a fifth of the price and better at drawing, but you feed every sheet by hand. Fine for a few dozen cards, painful for hundreds. See iAuto vs iDraw H A3.
• vs AxiDraw-style plotters: cheaper and excellent for art, but no feeder.
• vs handwriting services: companies that write cards for you charge per card. If you send thousands a year, owning an iAuto can pay for itself.

Price and value

At $2,799, the iAuto is a business tool, not a hobby purchase. Run the numbers: if handwritten mail lifts your response rates and you send hundreds of pieces a month, it is good value. If you send a few dozen a year, buy an iDraw.

Final thoughts

For handwriting at scale, the iAuto is impressive and genuinely automatic. Treat drawing as a bonus, use quick-drying pens, and set aside an afternoon to learn the software.

Sources

• CNX Software: UUNA TEK iAuto review (October 2026)
• UUNA TEK official store: iAuto (price, capacity and pen size)