DrawViewer vs K37 Simple Flows
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DrawViewer
Read full descriptionHide full description
This app lets you quickly load and inspect draw.io files on iOS. Whether you are reviewing technical diagrams, system designs, or documentation, the experience stays focused, fast, and easy to navigate. DrawViewr uses diagrams.net-based web rendering in the background to display supported diagram files. Draw.io is a trademark of its respective owner. DrawViewr is an independent viewer app and is not affiliated with or endorsed by draw.io or diagrams.net, they are so nice to provide the web rendering. Features: • Open draw.io files • Smooth zooming and panning • Multi-page diagram support • Quick file access via the Files app • Clean and minimal interface Perfect for engineers, developers, and anyone working with diagrams on the go.
K37 Simple Flows
Read full descriptionHide full description
Simple Flows is a straightforward, private flowchart maker for planning, explaining, printing, and sharing visual processes. Build a chart from a blank canvas or a practical template, add familiar shapes, connect decisions, and keep everything organized on your device. FEATURES • Create flowcharts from a blank canvas or starter template • Add process, decision, start/end, document, and other familiar shapes • Drag and resize shapes on a flexible canvas • Connect steps with arrows and Yes, No, or custom labels • Edit text, shape type, and color • Duplicate, reorder, and delete chart elements • Export clean PDF or PNG copies • Print in US Letter or A4, portrait or landscape • Save and import editable Simple Flows backup files • Choose from 17 cultural visual themes • Keep flowcharts locally on your device • No account and no subscription Create and fully use three flowcharts for free. A one-time Full Version purchase unlocks unlimited saved flowcharts. All other app features remain included in the free version. No subscription is required. Simple Flows is designed by K37 Software for individuals, families, students, and small teams who want understandable everyday diagrams without enterprise complexity.
Screenshots
Verdict
The clearest difference is in-app purchases: DrawViewer at none against K37 Simple Flows's 1. On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. K37 Simple Flows sells 1 one-off in-app purchase. DrawViewer asks for nothing beyond the download.
| Parameter | DrawViewer | K37 Simple Flows |
|---|---|---|
| Price | Free | Free |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 0 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Florian Schwaikl | K37 Software LLC |
In-app purchases
DrawViewer
No in-app purchases
K37 Simple Flows
- Simple Flows Full Unlock$2.99
Questions
Is DrawViewer free?
Is K37 Simple Flows free?
Do DrawViewer or K37 Simple Flows have ads?
Other comparisons















