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If you’ve been looking for an app to help project your sewing patterns onto fabric, there’s one you need to see: Sewsy. I’ve tested a lot of different methods for projecting and calibrating a phone projector for sewing, and in this review I’m putting Sewsy to the test to see if it’s worth your time — or if it’s missing what you need most.
What Is Sewsy?
Sewsy is a free app for iOS and Android that lets you prepare, print, project, and cut digital PDF and SVG sewing patterns straight from your phone connected to your projector.
This review is part of my ongoing series comparing projector sewing with phone apps. Pattern Projector was the first simple projecting-and-cutting calibration method available on phones, and I already covered IntelliSew in an earlier video. Sewsy is next up — if you missed the rest of the series, I’ll link those videos at the end of this post.
Sewsy was built as a personal challenge by its developer, Kylea — a mom of two who wanted a projector sewing app that could accommodate stopping mid-project and picking right back up during the next free moment. That intention shows up throughout the app’s design.
Calibrating Your Projector with Sewsy
Sewsy gives you two calibration methods to choose from.
Method 1: Cutting mat calibration This will look familiar if you’ve used Pattern Projector before. You drag and drop each corner of an on-screen rectangle to the edges of your cutting mat, using the same on-screen arrows for fine-tuning that make it easier to line things up precisely on a small phone screen. Once your corners are set, you tap through and enter your mat’s actual measurements (in inches or centimeters), and Sewsy calculates your calibration from there.
During calibration, you can also choose your display option — white background with black lines, or inverted colors like pink or green — whatever is easiest for you to see.
Method 2: Measuring tape calibration This method doesn’t require a cutting mat at all, which makes it ideal if you’re projecting onto the floor or a large surface and want to trace your pattern directly onto fabric. You size a rectangle to fit your projection area, then measure each side individually (top, bottom, sides, and one diagonal) to the nearest eighth of an inch, entering each measurement as you go. Sewsy uses those numbers to calculate an accurate calibration without needing a grid.
If a measurement doesn’t look right, you can back up and redo any single side without starting over.
Working with a Pattern in Sewsy
Once calibrated, opening a pattern shows all your layers by default. From there:
- Layers: Select all, deselect all, or choose individual layers — I typically deselect all and just turn on what I need, like the size and cut lines.
- Move tool: This is one of my favorite features. You can precisely move your pattern by an exact amount — down to the nearest 16th of an inch, or a specific measurement like 2⅛ inches — which is huge when you’re lengthening or shortening a pattern on the fly.
- Display options: You can increase line weight for better visibility on your projection surface, and choose from several color combinations (black lines on white, colored lines, inverted backgrounds, etc.).
- Transform tools: Rotate by any degree amount (quick 45° rotations for bias-cut pieces are one tap away), flip horizontally or vertically, and use the flip-line feature to flip a pattern piece exactly across a fold line without having to move your fabric.
- Zoom controls: Zoom to fit to see the whole pattern, jump to 100% (your true calibrated scale — this is the zoom level you should cut at), or zoom to 200% to read small text. Note: if increased line weight makes zoomed-in text blurry, reduce the line weight and it becomes clear.
- Map view: A minimap (similar to what you’d see in Affinity Designer or Inkscape) shows a highlighted box indicating where you are on the full pattern, so you can quickly navigate to the next piece.
- Grid overlay: Lets you double-check your calibration accuracy against a physical ruler at any time.
- Check marks: Add a checkmark to any cut piece to track your progress, move or resize it, and clear individual marks or all of them at once.
All of these features — including the ones that other apps charge for — are free in Sewsy, with no pro tier or subscription required.
Picking Up Where You Left Off
Sewsy holds onto your 10 most recently opened patterns and remembers exactly where you left off, including your checkmarks and display settings (line weight, colors, etc.). If you need to pause mid-project, you can close the app and come right back to it later without redoing any setup.
Stitching Multi-Page Patterns
For multi-page PDF patterns, Sewsy has a built-in “stitching” feature (digitally taping your pages together). You choose your page flow (left-to-right vs. top-to-bottom), then align crosshairs on each page until they match up. If a page is missing or misaligned, you can insert a blank page to correct the layout. Once stitched, you can export the combined pattern to save it, or move straight into projecting it like any other pattern.
The Print Feature: Sewsy’s Standout
This is where Sewsy really sets itself apart. Most projector apps assume you’ll only ever project — but Sewsy lets you print your patterns, too, and lets you select which layers to include for free. Very few apps still offer layer selection in their free tier.
You can select individual pages, all pages, or a specific page range, then print directly. Just make sure double-sided printing is off and scaling is set to 100% so your calibration square prints accurately. If you’re someone who still prints patterns, this feature alone makes Sewsy worth downloading.
A Note on Image Quality (Updated)
While filming this review, I ran into noticeably pixelated pattern lines that didn’t improve when zooming in — enough that it would have kept me from using the app long-term. However, while editing this video, Sewsy’s developer released an update with improved image rendering. Pattern lines are now much clearer, and you can zoom in and actually read the cut instructions. There’s still a brief loading delay when opening patterns, but it’s a minor tradeoff, and it’s the kind of thing that tends to improve with future updates.
Final Verdict
Sewsy fills a real gap for anyone still printing sewing patterns from their phone, and it makes a smooth transition into projecting once you’re ready. If you’ve used Pattern Projector before, Sewsy will feel like an easy, intuitive next step.
My favorite features are the precise move tool for lengthening and shortening patterns, and the checkmark/auto-save system that makes it simple to stop mid-project and jump right back in later.
Sewsy is available for free on both iOS and Android. If you’re projector sewing with a phone — or still printing your patterns and want an easier system — it’s absolutely worth trying.
Download Sewsy: Sewsy — Digital Sewing Pattern Tools
Missed the rest of the series? Catch my reviews of Pattern Projector and IntelliSew. And if you want to learn more about getting started with projector sewing or making sewing pattern alterations, check out my courses.
