Comparison

Magnet Crop vs OpenCards

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

Head to head
About

Magnet Crop

This app uses AI to automatically crop screenshots, detecting edges, frames, and text baselines. It allows for uniform padding with rounded corners and offers pixel-level zoom. Batch cropping is available for images with identical resolutions.

Highlights
  • AI-powered auto cropping
  • Edge, frame, and text baseline detection
  • Uniform padding with rounded corners
  • Pixel-level zoom
  • Batch cropping for similar resolutions
  • Multiple aspect ratios
Features
Read full description

Crop screenshots magnetically. Stitch screenshots. Magic crop with a tap. The app detects edges, frames and text base lines in screenshots. Add uniform padding with rounded corners to the crop region. Zoom in to pixel-level detail, powered by SwiftUI shaders. Various aspect ratios are available. Batch cropping is available for images with the same resolution.

About

OpenCards

Transform your Markdown notes into interactive knowledge cards. Organize, review, and access your information seamlessly across devices. Supports rich formatting, including math equations and code.

Highlights
  • Markdown cards with math and code highlighting
  • Organize cards into sections
  • Tags and likes with filtering
  • Full-screen swipe navigation
  • Global search
  • iCloud sync
  • GitHub Markdown import
Features
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OpenCards — Organize Your Knowledge Turn your Markdown notes into beautiful, browsable knowledge cards. OpenCards helps you organize, review, and carry your knowledge everywhere. Organize Your Way Create sections to group your cards by topic — class notes, research papers, vocabulary, or anything you need. Browse cards in a smooth horizontal carousel or search across your entire collection instantly. Rich Markdown Rendering OpenCards renders full Markdown with support for math equations (KaTeX), syntax-highlighted code blocks, tables, and more. Your content looks great in both light and dark mode. Tag, Like & Filter Mark your favorite cards with a like. Add tags to categorize and find cards quickly. Filter any section by likes or tags to focus on what matters. Full-Screen Reading Tap any card to enter an immersive full-screen view. Swipe through cards one by one — perfect for studying and review. iCloud Sync Your cards sync automatically across all your devices via iCloud. Start on your iPhone, continue on your iPad. Import from GitHub Paste a GitHub folder URL to bulk-import Markdown files directly into any section. Great for pulling in shared notes, study materials, or documentation. Key Features - Markdown cards with math (KaTeX) and code highlighting - Organize cards into sections - Tags and likes with per-section filtering - Full-screen card feed with swipe navigation - Global search across all cards - iCloud sync across devices - GitHub Markdown import Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Magnet Crop1 screens
OpenCards4 screens

Verdict

The call

The clearest difference is ratings volume: Magnet Crop at 18 against OpenCards's 1. OpenCards's advantage is rating (5.0 vs 4.8) and iOS requirement (18.6 vs 26.0). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Magnet Crop sells 1 one-off in-app purchase and OpenCards sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

OpenCards holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Magnet Crop has 18 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Magnet Crop ships an update every 4 weeks, OpenCards fortnightly. The most recent releases landed on October 27, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 7 level
Magnet Crop versus OpenCards: the parameters behind the verdict, then further details
ParameterMagnet CropOpenCards
PriceFreeFree
Rating4.8 (18 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings18 — better1
Update frequencyEvery 4 weeksFortnightly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, Mac, Vision Pro — betteriPhone, iPad, Mac
Requires iOS26.018.6 — better
Further details — not scored
Size57 MB2 MB
Age rating4+4+
DeveloperAnton Heestand礼 付

Customer experience

Magnet Crop

All ratings18 ratings
Positive94.4%
Neutral5.6%
Negative0.0%
Written reviews14 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

OpenCards

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Magnet Crop

One-time1
  • Batch Crop & Stitch$4.99
1 purchases

OpenCards

Subscriptions1
  • OpenCards Pro$0.991 Month

Questions

Is Magnet Crop free?
Magnet Crop is free to download, with in-app purchases available.
Is OpenCards free?
OpenCards is free to download, with in-app purchases available.
Which has better reviews, Magnet Crop or OpenCards?
OpenCards is rated higher. Magnet Crop averages 4.8 out of 5 from 18 ratings, while OpenCards averages 5.0 from 1 ratings.
Do Magnet Crop or OpenCards have ads?
Neither Magnet Crop nor OpenCards shows ads.
Which is updated more often, Magnet Crop or OpenCards?
Magnet Crop ships an update every 4 weeks, and OpenCards fortnightly. Most recently, Magnet Crop was updated on October 27, 2026 and OpenCards on October 7, 2026.

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