Comparison

DiagramFlow Studio vs K37 Simple Flows

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

DiagramFlow Studio

Features
Read full description

Move from outline to diagram without losing the structure of your idea. DiagramFlow Studio is a local-first visual workspace for mind maps, flows, system sketches, and project outlines. BUILD VISUALLY β€’ Create projects with connected nodes β€’ Drag nodes around the canvas β€’ Add, edit, and connect ideas β€’ Apply an automatic layout when you want a clean starting point START FROM TEXT β€’ Convert a Markdown outline into diagram nodes β€’ Keep a readable outline alongside the visual canvas β€’ Search and organize your project library SAVE AND DELIVER β€’ Create named version snapshots β€’ Export the complete project as Markdown, SVG, or JSON β€’ Share only when you choose PRIVATE BY DEFAULT Projects and snapshots are stored locally. DiagramFlow Studio does not include advertising or cross-app tracking. The free version includes the core workflow. Pro is a one-time in-app purchase that unlocks unlimited projects and snapshots, complete exports, and future Pro features. Price and availability are shown by the App Store. The Pro screen includes Restore Purchases and a direct link to Apple’s refund-request process, including guidance for requests submitted within seven days. Eligibility and approval are determined by Apple.

About

K37 Simple Flows

Features
Read 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 β€’ Create flowcharts from a blank canvas or starter template β€’ Add process, decision, start/end, document, and other familiar shapes β€’ Drag and resize shapes on a flexible canvas β€’ Connect steps with arrows and Yes, No, or custom labels β€’ Edit text, shape type, and color β€’ Duplicate, reorder, and delete chart elements β€’ Export clean PDF or PNG copies β€’ Print in US Letter or A4, portrait or landscape β€’ Save and import editable Simple Flows backup files β€’ Choose from 17 cultural visual themes β€’ Keep flowcharts locally on your device β€’ 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

DiagramFlow Studio4 screens
K37 Simple Flows1 screens

Verdict

The call

DiagramFlow Studio and K37 Simple Flows are too close to call on the numbers: across 5 compared parameters β€” price, ads, in-app purchases and device support among them β€” neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. DiagramFlow Studio sells 1 one-off in-app purchase and K37 Simple Flows sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
DiagramFlow Studio versus K37 Simple Flows: the parameters behind the verdict, then further details
ParameterDiagramFlow StudioK37 Simple Flows
PriceFreeFree
Update frequencyEvery 5 weeksβ€”
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details β€” not scored
Size5 MB4 MB
Age rating4+4+
DeveloperYu Shiung JiangK37 Software LLC

In-app purchases

1 purchases

DiagramFlow Studio

One-time1
  • εœ–ζ΅ DiagramFlow Studio Pro θ§£ιŽ–$2.99
1 purchases

K37 Simple Flows

One-time1
  • Simple Flows Full Unlock$2.99

Questions

Is DiagramFlow Studio free?
DiagramFlow Studio is free to download, with in-app purchases available.
Is K37 Simple Flows free?
K37 Simple Flows is free to download, with in-app purchases available.
Do DiagramFlow Studio or K37 Simple Flows have ads?
Neither DiagramFlow Studio nor K37 Simple Flows shows ads.

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