Flowdia Diagrams vs ThinkSpace
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flowdia Diagrams
Create professional flowcharts, mind maps, and various other diagrams with an intuitive interface. Easily connect shapes, add elements, and customize your designs. Export your work in multiple formats, including PNG, JPG, PDF, and SVG.
- Create flowcharts, mind maps, BPMN, and network diagrams
- Intuitive shape connection and element addition
- Customizable shape appearance
- Export to PNG, JPG, PDF, and SVG
- Import custom images
- Supports various UML diagram types
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Flowdia is an easy to use flow diagram tool that can be used to quickly create professional quality flowcharts, mind maps, BPMN, network and server layouts, Cisco network, Rack diagram, UML activity, business process and process flow diagrams. The app is designed with ease of use in mind. You can quickly connect flowchart shapes by simply selecting the start and end connection points and quickly add new lanes to a swimlane diagram or new sub-topics to a mind map diagram by using "+" button from the selected swimlane or mind map shape menu. The mind map sub-topics are automatically positioned on the page but can be easily moved as required. Flowdia supports export of the diagram / flowchart to PNG, JPG, PDF and SVG formats.You can view exported SVG files in Microsoft Visio. You can import custom PNG and JPG images. The following diagrams can be created using Flowdia: - Flowchart - Swimlanes - Mind Maps - BPMN - Network Diagram - AWS Architecture Diagram - Cisco Network Diagram - Server Layout Diagram - Rack Diagram - UML Class Diagram - UML Activity Diagram - UML Use Case Diagram - UML Sequence Diagram - Business Process Diagram - Process Flow - Chevron Diagram You can quickly select and change BPMN activity, event and gateway types by using the special shape selector available to all BPMN shapes. The flowchart shapes in this tool are not images can be re-sized without loosing quality. You can customize the look of the shapes by applying background color and also change the font color and size of the text. **NOTE: Free version of Flowdia is restricted to: - 4 files. - 1 page per diagram. - Cannot remove or duplicate pages. - Image and PDF exports with watermark
ThinkSpace
This app is a powerful thinking tool that supports creative workflows with an intuitive interface and various thinking methods. It offers features like handwritten notes, unlimited canvases, idea generation frameworks, and real-time collaboration to aid brainstorming and idea structuring.
- Handwritten sticky notes
- Unlimited canvas sizes
- Idea generation frameworks
- Real-time sharing
- Mind mapping
- Diagram creation
- AI brainstorming
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Too much on your mind, and no idea where to start? AI chats, posts you saw, books you read, things people told you. There is more to think about every day. ThinkSpace is a thinking notebook: put your thoughts on cards, then arrange and connect them as you think. As you move cards around and put ideas into your own words, your understanding deepens. ■ How it works Start with a single card: whatever is on your mind. 1. Collect: AI chats, web pages, photos, passing thoughts, via the Inbox or by pasting. 2. Write it down: turn them, and what is in your head, into handwritten or text cards. 3. Arrange and see the big picture: move, group, and connect cards. Step back, and unexpected connections, next questions, and next actions appear. 4. Explain: say what your cards or map mean, out loud, in your own words. Read the transcript back to check what you really understand. ■ Great for - Clearing your head when AI chats pile up - Making sense of books and videos, and turning them into questions and actions - Connecting ideas from research papers and textbooks so you can explain them in your own words - Creating nursing concept maps and connecting conditions, symptoms, and care - Bringing a story's world, characters, timeline, and ideas into one structure - Journaling: writing out tangled feelings and worries - Designing your career in the AI era, a social media strategy, or a product - Connecting visions and goals to concrete actions and reviews - Working through problems at work: causes, solutions, validation, results ■ Start from a purpose-built map No need to stare at a blank canvas wondering where to begin. - Concept map - Problem-solving map - Pathophysiology map - Career map for the AI era - Worldbuilding map - Social media strategy map - Habit-building map - Product design map - Vision map and more — start from a foundation that fits your topic. ■ Turn AI chats into a growing map Ask AI about a card and add the answers to your map. Break answers into ideas, connect them, and make sense of them in your own words; looking over the map sparks new questions to dig into. Your AI inputs are never used for training. ■ Key features - Infinite canvas: place cards anywhere, half-formed thoughts included. - Handwriting and text: Apple Pencil supported. Jot down ideas on cards and move them around with your finger. - Mind maps, flowcharts, groups, and connections: radial thinking, steps, cause and effect. - Send from AI chats: send a conversation from Claude or the share sheet to the ThinkSpace Inbox, then drag it in as a card. - Explain out loud: describe a card or map in your own words; it is transcribed and saved. You notice where your understanding is thin, and can read it back later. - Ask AI: ask about a card and add the answer as a new card. - Extract key-point cards from long notes and web pages. - AI brainstorming: branch a topic card into angles and questions. - Paste into cards: copied text, photos, or URLs become cards. - Add web pages, images, and screenshots to your canvas. - Search and reuse cards across maps. - Link canvases: big themes and subtopics in layers. - Export to image, PDF, and text. - Local-first: saved on your device, works offline. - Sync across devices (Pro): iPhone, iPad, and Mac. Turn scattered information and AI answers into understanding you can explain and act on. ■ Pro access - Unlimited canvases - Unlimited cards and groups - Expanded AI usage limit - Full feature access ——— Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. The renewal fee is charged to your iTunes account within 24 hours before the period ends. You can turn off auto-renewal anytime in your App Store account settings. ——— Terms of Service: https://thinkspace-public.s3.ap-northeast-1.amazonaws.com/terms-en.html Privacy Policy: https://thinkspace-public.s3.ap-northeast-1.amazonaws.com/privacy-policy-en-v2.html
Screenshots
Verdict
The clearest difference is rating: ThinkSpace at 4.3 against Flowdia Diagrams's 3.4. ThinkSpace also leads on ratings volume (276 vs 66). Flowdia Diagrams's advantage is update cadence (every 2 weeks vs every 6 weeks). On price, review sentiment, ads and in-app purchases 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. Flowdia Diagrams sells 1 one-off in-app purchase and ThinkSpace sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
ThinkSpace holds the better App Store score, 4.3 against 3.4. Both are backed by a comparable volume of ratings — 66 and 276 respectively. Written reviews split almost evenly too, at 54% and 54% positive.
Flowdia Diagrams ships an update every 2 weeks, ThinkSpace every 6 weeks. Both last shipped on November 2, 2026.
| Parameter | Flowdia Diagrams | ThinkSpace |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (66 ratings) | 4.3 (276 ratings) — better |
| Positive reviews | 54.2% of reviews — better | 53.6% of reviews |
| Number of ratings | 66 | 276 — better |
| Update frequency | Every 2 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 24 MB | 261 MB |
| Age rating | 4+ | 17+ |
| Developer | Behzad Gorimar | Naoya Enokida |
Customer experience
Flowdia Diagrams
ThinkSpace
Bugs and requests
Flowdia Diagrams
Not enough reviews yet to summarise bugs or requests.
ThinkSpace
Reported bugs
20 issues- App crashes on launch or during use
- Data disappears after upgrading to paid version
- Canvas fails to load with many items
- Text boxes become uneditable
- Grouped items move unexpectedly when resizing
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- Eraser tool causes crashes
- Login freezes and network connection errors
- Registration and account creation failures
- Undo function doesn't work properly
- Cards stick or behave erratically
- Zoom tool tab not displaying
- Export function unresponsive on Mac
- Text wrapping and alignment issues
- Sticky notes change size unexpectedly
- Items disappear from canvas
- Forced quit required to close app
- Laggy performance with Apple Pencil writing
- Sync failures between iPad and Mac
- Auto-organize feature snaps items incorrectly
- White background export issues
Requested features
19 requests- One-time purchase option instead of subscription
- Dark mode theme
- Better palm rejection for Apple Pencil
- Folder/project organization system
- Ability to delete canvases easily
Show 14 moreShow fewer
- Improved text editing within cards
- Better arrow/connector customization
- Undo with multi-finger gestures (like Procreate)
- Export to vector formats (SVG)
- Zoom controls for Mac version
- Better grouping and ungrouping functionality
- Collaborative editing features
- iCloud sync option
- Highlighter tool
- Custom colors and pen sizes
- Canvas renaming functionality
- Better keyboard shortcuts for Mac
- Chromebook support
- Auto-layout option for mind maps
In-app purchases
Flowdia Diagrams
- Upgrade to Premium$9.99
ThinkSpace
- ThinkSpace Pro Access$2.991 Month
- ThinkSpace Pro Access$29.991 Year







