Comparison

Minus Board vs Approval Studio

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

Head to head
About

Minus Board

This app provides a simple digital canvas for drawing and idea sharing. Collaborate in real-time with others by sharing a link, allowing them to view your creations instantly. It's designed for seamless idea expression and global collaboration.

Highlights
  • Finger and Apple Pencil drawing
  • Two-finger erasing gesture
  • Real-time drawing sharing
  • Slack integration
  • Idea expression and sharing
Features
Read full description

Minus Board is a simple and easy-to-use whiteboard app that allows you to draw with either your finger touches or Apple Pencil. You can share the link of the whiteboard to your remote co-workers or anyone around the world, they can see your drawing in real-time. It's an ideal app designed for expressing your idea and share it to anyone from anywhere. Features: - Support Apple Pencil - Two finger erasing gesture - Real-time drawing share - Slack integration We offer in-app purchase for real-time drawing share feature, . The subscription price for sharing service is $9.99 USD per month. It will be charged on your iTunes account monthly. The renewal is manual, you need to renew it when your subscription period ends. We offer seven days free trial for you to try it out. Terms of Service: https://minuslabs.com/terms-of-service Privacy Policy: https://minuslabs.com/privacy-policy

About

Approval Studio

Features
Read full description

Approval Studio: Professional Design Proofing & Collaboration What Approval Studio Does Approval Studio is online proofing software for real-time design review and artwork approval. Instead of managing feedback through scattered emails, teams use one organized platform to review, annotate, and approve creative projects efficiently. Upload designs, invite stakeholders, collect visual feedback, and manage approval workflows in a single workspace. Every comment, revision, and decision is tracked for complete project visibility. Core Features Visual Annotation System Pin feedback directly onto design elements using annotation tools including rectangles, circles, arrows, and freeform drawing. Reviewers highlight specific areas and leave detailed comments for clear communication between teams and clients. Project Organization Organize projects using customizable kanban boards with stages like "Initiated," "Under Review," "Client Feedback," and "Approved." Track project progress visually and ensure nothing slips through the cracks. Simple Collaboration Invite external users and clients to review designs with simple links - no complicated registrations required. Team members collaborate using discussion tabs and can tag specific users in comments. Formal Documentation Generate formal PDF proof reports capturing all client feedback and project decisions. Track project actions automatically and maintain complete records of the review process. Multi-Format Support Review various creative file types including images, documents, and designs with accurate rendering for precise feedback. Version Comparison Compare different design versions to track changes and ensure feedback implementation between iterations. Key Integrations Adobe Creative Cloud Upload files and check projects directly in Photoshop, Illustrator, and InDesign using the official Adobe Creative Cloud Extension. Zapier Connectivity Connect to 5,000+ apps from Zapier catalogue and build custom workflow templates for automated data exchange with business tools. Shopify Integration Designed for print-on-demand stores. Create projects for order numbers, upload designs, share with customers, and get feedback on mockups instantly. API Access Integrate with custom applications and existing business systems through comprehensive API access. Slack Integration Receive timely updates and notifications about project progress, comments, and approval status in team Slack channels. How It Works Create projects and upload creative assets. Invite stakeholders via email or shareable links. Reviewers add visual annotations and comments directly on designs through web browsers. Projects move through defined approval stages based on feedback. Upload new versions that replace previous iterations while maintaining project history. Once approvals are collected, projects reach completion with formal documentation available. Professional Workflow Management Approval Studio eliminates email-based review inefficiencies. Everything centralizes in one platform with clear visual project status indicators. Serves creative agencies, in-house marketing teams, e-commerce operations, and organizations requiring professional creative workflow management. Streamlines the entire process from initial concept review to final approval. Mobile Access Access complete Approval Studio workspace from iPhone and iPad. Review projects, add comments, approve designs, and manage workflows from anywhere with seamless sync between mobile and web version. Transform creative collaboration with organized workflow management and professional design review capabilities.

Screenshots

Approval Studio4 screens

Verdict

The call

The clearest difference is in-app purchases: Approval Studio at none against Minus Board's 4. Minus Board's advantage is update cadence (every 3 weeks vs every 10 months) and iOS requirement (9.1 vs 18.4). On price, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Minus Board sells 4 in-app purchases, starting at $9.99 per month. Approval Studio asks for nothing beyond the download.

UpkeepUpdate frequency

Minus Board ships an update every 3 weeks, Approval Studio every 10 months. The most recent releases landed on October 21, 2026 and October 18, 2026 respectively.

Scorecard3 real differences · 7 level
Minus Board versus Approval Studio: the parameters behind the verdict, then further details
ParameterMinus BoardApproval Studio
PriceFreeFree
Rating2.3 (3 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 weeks — betterEvery 10 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPadiPhone, iPad — better
Requires iOS9.1 — better18.4
Further details — not scored
Size26 MB3 MB
Age rating4+4+
DeveloperLaunch Platform LLCHiTech Service LLC

In-app purchases

4 purchases

Minus Board

Subscriptions1
  • Real-time sharing1 Month trial$9.991 Month
One-time3
  • Minus Board 30 Days$2.99
  • Minus Board 90 Days$4.99
  • Minus Board 180 Days$9.99
None

Approval Studio

No in-app purchases

Questions

Is Minus Board free?
Minus Board is free to download, with in-app purchases available.
Is Approval Studio free?
Approval Studio is free to download, with no in-app purchases.
Do Minus Board or Approval Studio have ads?
Neither Minus Board nor Approval Studio shows ads.
Which is updated more often, Minus Board or Approval Studio?
Minus Board ships an update every 3 weeks, and Approval Studio every 10 months. Most recently, Minus Board was updated on October 21, 2026 and Approval Studio on October 18, 2026.

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