Comparison

Superhuman Mail vs CardKit

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

Head to head
About

Superhuman Mail

This email application streamlines inbox management with AI-powered drafting and summarization. It helps users prioritize important messages, schedule emails for optimal delivery, and collaborate with teams through shared email views and integrated CRM tools. Save time and improve responsiveness with advanced features.

Highlights
  • AI email drafting
  • Automatic email summarization
  • Customizable inbox triage
  • Scheduled email delivery
  • Email sharing and commenting
  • Calendar integration
  • CRM integrations (HubSpot, Salesforce)
Features
Read full description

Superhuman Mail is the most productive email app ever made. Designed to help you fly through your inbox, be more responsive to what matters most, and collaborate faster than ever before, Superhuman Mail helps teams on Gmail and Outlook save 4+ hours per person each week. FLY THROUGH YOUR INBOX 2X FASTER Write better and faster with AI that matches your unique style for each person. Get draft replies on every email that needs a response, ready to edit and send. Turn your thoughts into polished emails in seconds with Write with Voice. Stay a step ahead with an automatic 1-line summary above every conversation. Automate phrases and entire emails with Snippets. BE MORE RESPONSIVE TO WHAT MATTERS MOST Automatically triage incoming email with customizable inbox splits, so you can always focus on what matters most. Avoid the clutter for good with Auto Archive. Never let a follow-up slip, with automatic reminders to reply. Send emails when they're most likely to be opened, so you land at the top of your recipient's inbox at just the right time. COLLABORATE FASTER THAN EVER BEFORE Share a live view of any email, and add comments for your team—no need to repeatedly screenshot, forward, or bcc. See your calendar without leaving your inbox. Get full context on your customers and deals with HubSpot and Salesforce directly integrated. Connect all your Gmail and Outlook accounts to AI tools like Claude and ChatGPT via the Superhuman Mail MCP. Teams save 20 million hours every single year with Superhuman Mail. https://superhuman.com/terms

About

CardKit

Features
Read full description

Your cards. Your device. Your vault. CardKit gives your important cards and document copies one private home. Keep membership cards, loyalty cards, insurance cards, IDs, passports and more together, without creating an online account. SCAN IT. NAME IT. KEEP IT. Scan the front, then add the back or extra pages if you need them. One page is enough. The automatic scanner finds document edges and corrects perspective. Name your document and review recognized details before saving. ENCRYPTED ON YOUR DEVICE Card details, document images and thumbnails are encrypted locally. Unlock with a six-digit PIN or supported biometrics. Sensitive values start hidden. CardKit does not require an account or upload your cards to a cloud service. FIND IT IN A MOMENT Browse a physical card stack or an alphabetical library. Search names, numbers, tags and recognized text. Favorite the cards you use every day. SHOW CODES. SHARE SELECTED DETAILS. Present supported QR codes and barcodes with high contrast. Export a PDF and choose which images and fields to include. Images can contain visible personal information; turn them off separately when needed. BACK UP YOUR VAULT Save an encrypted CardKit backup and keep your twelve recovery words somewhere safe. Restoring requires both the backup file and the recovery words. COPIES FOR EVERYDAY CONVENIENCE Saved ID and passport images are digital copies, not substitutes for official documents. Payment cards are stored only as limited references without card images or security codes. CardKit is not a payment service. A little lighter. Always with you.

Screenshots

Superhuman Mail4 screens
CardKit4 screens

Verdict

The call

The clearest difference is iOS requirement: CardKit at 16.4 against Superhuman Mail's 26.0. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 9 level
Superhuman Mail versus CardKit: the parameters behind the verdict, then further details
ParameterSuperhuman MailCardKit
PriceFreeFree
Rating4.6 (3.7K ratings) — better—
Positive reviews41.1% of reviews—
Number of ratings3.7K — better—
Update frequencyWeekly—
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.016.4 — better
Further details — not scored
Size101 MB65 MB
Age rating12+4+
DeveloperSuperhuman LabsBEK Service GmbH

Bugs and requests

Superhuman Mail

Reported bugs

4 issues
  • Login issues and account activation problems
  • Emails not loading or syncing properly
  • Formatting issues in email threads
  • Crashes and freezes on various devices

Requested features

5 requests
  • Unified inbox for multiple accounts
  • Better calendar integration
  • More customization options
  • Improved mobile app experience
  • Table support in email composition

CardKit

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Superhuman Mail

No in-app purchases

None

CardKit

No in-app purchases

Questions

Is Superhuman Mail free?
Superhuman Mail is free to download, with no in-app purchases.
Is CardKit free?
CardKit is free to download, with no in-app purchases.
Do Superhuman Mail or CardKit have ads?
Neither Superhuman Mail nor CardKit shows ads.

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