Comparison

Zero Inbox vs Mailbutler mobile

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

Head to head
About

Zero Inbox

This email application streamlines inbox management with customizable multi-action swipe gestures. Effortlessly process emails by assigning multiple tasks to a single swipe, such as archiving, trashing, or sending to a to-do list. Enjoy a fast and intuitive email experience.

Highlights
  • Multi-action swipe gestures
  • Customizable swipe actions
  • Fast loading speed
  • Integration with Todoist
  • Smart avatar loading
  • Dark mode
Features
Read full description

Zero Inbox is an email app designed for zeroing your inbox via enjoyable swipe actions. Unlike traditional email's swipe action can only allow one action per swipe, we provide multi-action swipe for each direction, empower you to process your email effortlessly on daily basis. For example, for swiping right, you can choose - Swipe right-down-right to push the email to Todoist - Swipe straight right to archive - Swipe right-up-right to trash We also worked hard to make the app to provide blazing fast loading speed. There are more awesome features to come in the following updates: - Customizable swipe actions - In mail swipe action (like Tinder but for email) - Multi-step swipe (one swipe can do many things like Mark read + Archive + push to Todoist) - Smart avatar (load sender's avatar from known email list or public avatar database) - Dark mode

About

Mailbutler mobile

Enhance your email productivity on the go with this app. Track email opens, manage contacts, and organize tasks and notes. Collaborate with your team by sharing essential information.

Highlights
  • Email Tracking
  • Contact Management
  • Task Management
  • Note Taking
  • Team Collaboration
  • Email Insights
Features
Read full description

This is Mailbutler, the companion app to our popular email extension which makes your inbox smarter. Mailbutler gives you everything you need to maximize your productivity and keep your email on point. It offers a multitude of useful, productivity-boosting features, and with our companion app, you can use our features on the go, never missing a trick. An extension of our desktop email app, it brings all of your tracking and insights features to your mobile, meaning you can send emails on your desktop and follow their progress on your phone. Features include: • Email Tracking: More information needed? Send tracked emails from your mobile phone and use the app to find out when, where, and how often your email or link was opened • Contacts: See all information about your contacts in the same place. Get essential insights into your contacts to maintain peak customer communication • Tasks: Always remember to take action. Attach to-do items to your contacts and emails. • Notes: Add notes to your emails and contacts so you never forget any information. • Collaborators: Be consistent. Share contacts, notes, tasks, signatures, templates and more across your whole team === Who is Mailbutler for? === • Freelancers, independent professionals, and marketers • Businesses, marketing teams, and sales teams which prioritise direct client communication • Teams which need clear, easy, and productive internal communication • Productivity-lovers who want to achieve more with emails and reach Inbox Zero! === Why Mailbutler? === • Focus on important projects and improve time management without distractions • Includes a wide range of useful features and our desktop version has affordable plans for every business’s needs • Mailbutler never accesses or reads your emails • Ensures your emails are the best they can possibly be • Helps you to improve your customer communication and build new prospects, clients and contacts === Testimonials === “Without a doubt, I recommend Mailbutler. It’s revolutionized my inbox.” Hollie Barac, Accountability and Productivity Partner “Mailbutler’s support feels personal and it’s what sets them apart from so many other companies.” Craig Bowman, President of Common Ground Consulting “With Email Tracking I can focus my energy on serving clients instead of chasing emails.” Charlene Brown, Owner of Bklyn Custom Designs “The ability to add notes and tasks directly in my email client is very helpful and I’ve never seen another program that offers this feature in such an integrated way.” Jeff Sanders, Productivity Coach === Why wait? Get Mailbutler right now === The Mailbutler mobile app is free, but you need to have the desktop version of Mailbutler to be able to use it. All new Mailbutler users get a 14-day free trial so they can try out all our features and decide which plan is the best for them, and we don’t require any credit cards details until you subscribe to a plan, so you can opt out at any time! Mailbutler Tracking Plan - Basic email and link tracking for people who just want to track their emails - €3,95 per month/€39,50 per year Mailbutler Professional Plan - For professionals who want to better organize their inbox – €7,95 per month/€79,50 per year Mailbutler Smart Plan - For heavy email users who need advanced inbox features - €12,95 per month/€129,50 per year Mailbutler Business Plan - The full package for teams that want the definitive email productivity extension – €29,95 per month/€299,50 per year Privacy Policy: https://www.mailbutler.io/privacy-policy/ Terms of Service: https://www.mailbutler.io/terms-and-conditions/ === Got questions? === Contact us anytime at support@mailbutler.io === Connect with us! === Facebook: https://www.facebook.com/mailbutler/ Twitter: https://twitter.com/mailbutler LinkedIn: https://www.linkedin.com/company/mailbutler-gmbh/

Screenshots

Zero Inbox3 screens
Mailbutler mobile1 screens

Verdict

The call

The clearest difference is in-app purchases: Zero Inbox at none against Mailbutler mobile's 6. Zero Inbox also leads on iOS requirement (12.0 vs 15.0). Mailbutler mobile's advantage is review sentiment (78% vs 50%) and ratings volume (126 vs 3). On price, rating, update cadence and ads 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. Mailbutler mobile sells 6 in-app purchases, starting at $8.49 per month. Zero Inbox asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Mailbutler mobile holds the better App Store score, 3.8 against 3.7. That said, the two scores are not equally well evidenced: Mailbutler mobile has 126 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 50% of Zero Inbox's written reviews are positive against 78% of Mailbutler mobile's.

UpkeepUpdate frequency

Zero Inbox ships an update every 3 weeks, Mailbutler mobile fortnightly. The most recent releases landed on October 9, 2026 and October 22, 2026 respectively.

Scorecard5 real differences · 5 level
Zero Inbox versus Mailbutler mobile: the parameters behind the verdict, then further details
ParameterZero InboxMailbutler mobile
PriceFreeFree
Rating3.7 (3 ratings)3.8 (126 ratings) — better
Positive reviews50.0% of reviews78.1% of reviews — better
Number of ratings3126 — better
Update frequencyEvery 3 weeksFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.0 — better15.0
Further details — not scored
Size27 MB19 MB
Age rating4+4+
DeveloperLaunch Platform LLCMailbutler GmbH

Customer experience

Zero Inbox

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Mailbutler mobile

All ratings126 ratings
Positive66.7%
Neutral11.9%
Negative21.4%
Written reviews251 reviews
Positive78.1%
Neutral6.4%
Negative15.5%

Bugs and requests

Zero Inbox

Not enough reviews yet to summarise bugs or requests.

Mailbutler mobile

Reported bugs

4 issues
  • Constant login issues on iOS
  • Flashing/blinking screen on iOS
  • Doesn't work properly with Gmail on iOS
  • Doesn't work anymore on iOS or Mac

Requested features

6 requests
  • Split screen functionality on iPad
  • Ability to set reminders for incoming emails
  • Full integration with iOS Mail app
  • Ability to send tracked emails from iOS
  • More a-la-carte feature options
Show 1 more
  • Better iPad optimization

In-app purchases

None

Zero Inbox

No in-app purchases

6 purchases

Mailbutler mobile

Subscriptions6
  • Professional (Monthly)$8.491 Month
  • Professional+ (Monthly)$14.991 Month
  • Business (Monthly)$31.991 Month
Show 3 more
  • Professional (Yearly)$86.991 Year
  • Professional+ (Yearly)$149.991 Year
  • Business (Yearly)$329.991 Year

Questions

Is Zero Inbox free?
Zero Inbox is free to download, with no in-app purchases.
Is Mailbutler mobile free?
Mailbutler mobile is free to download, with in-app purchases available.
Which has better reviews, Zero Inbox or Mailbutler mobile?
Mailbutler mobile is rated higher. Zero Inbox averages 3.7 out of 5 from 3 ratings, while Mailbutler mobile averages 3.8 from 126 ratings.
Do Zero Inbox or Mailbutler mobile have ads?
Neither Zero Inbox nor Mailbutler mobile shows ads.
Which is updated more often, Zero Inbox or Mailbutler mobile?
Zero Inbox ships an update every 3 weeks, and Mailbutler mobile fortnightly. Most recently, Zero Inbox was updated on October 9, 2026 and Mailbutler mobile on October 22, 2026.

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