Every email, perfectly sorted.
None of them finished.
Spark built the best organizer in email. Four categories, AI gist summaries, millions of downloads. And you still open it again after every meeting. Organization is not completion. Swizero replaces the sorting with a ranked stack you finish in minutes.
Spark won an Apple Editors' Choice award for organizing email. But organization is a process, not an outcome. The most perfectly sorted inbox in the world is still an inbox you check between every meeting.
The organized infinity
Smart Inbox. AI gist summaries. Categories for Personal, Notifications, Newsletters. Every email sorted into the right bucket. But the buckets never empty. You browse, you process, you close the app. Then you open it again. And again. The inbox is perfectly organized. It is also perfectly endless.
A stack you finish
AI ranks your email by importance and presents only the ones that matter as swipeable cards. You swipe through the stack and watch it empty. When the last card is gone, email is done. Not sorted. Not filed. Done as in close the app and forget about it until tomorrow.
Feature-by-feature comparison
Not just checkmarks. Context on what each feature actually means for your daily workflow.
How it works
Organization makes email prettier. Finishing makes it disappear.
What done looks like
Spark asks: is it organized? Swizero asks: are you free?
How you use it
Swipe-to-act vs browse-and-click. Both are mobile-friendly.
AI email ranking
Spark sorts into folders. Swizero surfaces what matters most, in order.
AI summaries
Both summarize well. Spark summarizes threads. Swizero summarizes every card in the stack.
AI drafts
Both draft well. Swizero never sends without your explicit approval.
AI auto-actions
Spark's AI sorts on your behalf. Swizero's AI prepares, then waits for your swipe.
Data handling
Where your email data lives and for how long.
Ranking intelligence
Spark sends your email patterns to its servers to power Smart Inbox.
Third-party training
Your email habits are valuable data. Who gets to use them matters.
Mobile app
Spark covers both mobile platforms. Swizero is iOS-only at launch.
Desktop app
Spark has full desktop coverage today.
Email providers
Spark supports nearly every email provider.
Team features
Teams is Spark's core strength. Swizero is built for personal email.
Price
Spark has a real free tier and Swizero does not. On paid plans the two are close, and Swizero is cheaper annually.
What you pay for
Spark saves you money. Swizero saves you time. At $6.67/mo, that is about 22 cents per day to reclaim half an hour.
How it works
Organization makes email prettier. Finishing makes it disappear.
What done looks like
Spark asks: is it organized? Swizero asks: are you free?
How you use it
Swipe-to-act vs browse-and-click. Both are mobile-friendly.
AI email ranking
Spark sorts into folders. Swizero surfaces what matters most, in order.
AI summaries
Both summarize well. Spark summarizes threads. Swizero summarizes every card in the stack.
AI drafts
Both draft well. Swizero never sends without your explicit approval.
AI auto-actions
Spark's AI sorts on your behalf. Swizero's AI prepares, then waits for your swipe.
Data handling
Where your email data lives and for how long.
Ranking intelligence
Spark sends your email patterns to its servers to power Smart Inbox.
Third-party training
Your email habits are valuable data. Who gets to use them matters.
Mobile app
Spark covers both mobile platforms. Swizero is iOS-only at launch.
Desktop app
Spark has full desktop coverage today.
Email providers
Spark supports nearly every email provider.
Team features
Teams is Spark's core strength. Swizero is built for personal email.
Price
Spark has a real free tier and Swizero does not. On paid plans the two are close, and Swizero is cheaper annually.
What you pay for
Spark saves you money. Swizero saves you time. At $6.67/mo, that is about 22 cents per day to reclaim half an hour.
A morning with each app
Same person. Same 112 emails. Two different experiences.
Open Spark. Smart Inbox has sorted 112 emails into Personal, Notifications, Newsletters, and Seen categories.
Sorted. But you still have to open every folder.
Browse Personal first. 18 emails. Read summaries, reply to three, star two for later.
Check Notifications. Scan through 34 items. Most are noise, but you still check because what if one matters.
Thorough, but getting tedious.
Newsletters and Seen categories. Skim, delete some. 60 emails still sitting in the inbox.
Categories are clean but email is not done.
Close Spark. Two categories still have unread items. You will check again after your commute.
Open Spark again on the train. 14 new emails sorted across categories. Start from the top.
Always sorted. Never finished. You will do this again after lunch, and again after dinner.
26 minutes across two sessions. Everything sorted. Nothing finished. You will check again after lunch.
Open Swizero. The same 112 emails went through AI ranking overnight. No categories to browse. No folders with badge counts. Just a stack, sorted by what matters most.
Nothing to organize. Just cards to act on.
First card: a coworker's request that Spark would have filed under Personal. Swizero ranked it number one because you always reply to this person fast. Swipe up, send the AI draft.
Three notification emails in a row. In Spark, you would have opened the Notifications category and scanned all 34. Here, the AI already decided they do not need you. They never made it into the stack.
You used to check categories 'just in case.' The stack removed the just in case.
A vendor invoice. Swipe down to archive. A newsletter you actually read. Swipe right to flag for the weekend. Two more cards, two more swipes.
Empty stack. No unread badges on any category. No Seen tab. No Newsletters folder with 8 items. Just an empty screen and permission to leave.
Seven minutes. No folders. No badge counts. You close the app and do not think about email again until tomorrow.
7 minutes. No categories to browse. No folders with unread counts. The stack is empty and there is nothing left to check.
Which one is right for you?
Five quick questions. We will point you to Swizero or Spark, and say plainly when Spark is the better call.
Answer all 5 to see your personalized match.
The honest case for each app
One app organizes the avalanche. The other makes it stop.
Choose Swizero if...
You have tried organizing email every possible way and realized the problem is not sorting. The problem is that email never ends.
- You want a clear finish line for every email session
- You process email on your phone and want gesture-first, one-handed flow
- You care deeply about email privacy and want zero data retention
- You want AI that ranks and drafts but never acts without your approval
- You would trade a few dollars for 20-40 minutes of your day back
Choose Spark if...
You need team collaboration features and cross-platform coverage at a great price.
- You work on a team and need shared inboxes, delegation, or email assignments
- You want a free email app across iOS, Android, Mac, and Windows
- You manage multiple email providers and need them in one place
- You like smart categories that keep your inbox visually organized
- You want a proven app with broad platform support and a free tier
Migrating from Spark, step by step
The exact steps, the real time each one takes, and the honest reasons you might stay put.
- 1
Keep Spark installed
0 secDo not cancel Plus or Pro, do not remove any accounts. Nothing here touches your Spark setup, and running both side by side is the only honest test.
- 2
Install Swizero on iOS
1 minJoin the beta and add the app from your invite. It is iOS-first and built for one hand, so there is nothing to install on a Mac or a PC.
- 3
Connect your Gmail
30 secSign in with Google through secure OAuth. Swizero connects to Gmail at launch, with Outlook planned. If your main account is iCloud, Yahoo, or Exchange, this is the step where you should stay on Spark for now.
- 4
Swipe your first stack
2 minNo Smart Inbox categories to browse and no folder badges to clear. Swizero hands you a fixed card limit. Swipe left to clear, down to archive, right to flag, up to reply.
- 5
Count your reopens for a week
Spark taught you to check between meetings. Count how often you reopen each app after you thought you were finished. That number is the real comparison. Nothing was migrated, so switching back costs nothing.
Where Spark is the better choice
Spark is a genuinely great app with millions of users, and we are not going to pretend otherwise. Here is where it wins today.
You need every platform
Spark ships iOS, Android, macOS, and Windows apps that stay in sync. Swizero is iOS-only at launch, with other platforms still to come.
Your team shares an inbox
Shared inboxes, assignments, shared drafts, and private comments on threads are Spark's core strength. Swizero is built for one person's personal email and has no team layer at all.
Free has to be an option
Spark's free tier is genuinely usable: Smart Inbox, unlimited accounts, and unified inbox at zero dollars. Swizero is free during beta and paid after that.
You run mail from several providers
Gmail, Outlook, iCloud, Yahoo, and Exchange all live in one Spark inbox. Swizero connects to Gmail at launch, with Outlook planned.
Spark plans and platforms taken from sparkmailapp.com: a free tier with Smart Inbox and unlimited accounts, Plus at $10 per user per month or $120 a year ($8.25 a month), Pro at $20 per user per month or $240 a year ($16.58 a month), and Enterprise on request, with iOS, Android, macOS, and Windows apps. Swizero is $9.99/mo or $79.99/yr, iOS and Gmail at launch. Last checked July 2026.
Check Spark's current pricingSwitching from Spark takes 2 minutes
What you keep, what changes, and what gets better.
Your Gmail stays untouched
Swizero connects via secure OAuth. Your existing labels, filters, and email history remain exactly where they are.
All your email, still there
Swizero surfaces the most important emails as cards. Everything else is still in Gmail whenever you need it.
From categories to a stack
Instead of browsing sorted folders, you swipe through a ranked stack. Most people adapt in one session.
From organized to finished
The biggest shift: you stop maintaining a system and start experiencing the relief of walking away. Email becomes something you complete, not something you tend.
Your mornings back
When email actually ends, you reclaim the 20-40 minutes you spent browsing categories, re-checking folders, and wondering if you missed something.
Privacy you can verify
Zero-retention cloud AI, on-device ranking, no third-party training. Your inbox is not a data product.
“Spark was great at organizing but I still checked it between every meeting. Swizero gives me a session that actually ends. I finish before breakfast now.”
Beta tester, former Spark Premium user
<10 min
Average session in beta
0
Categories to browse
1 session
Not endless check-ins
$0.22/day
To get your mornings back
Compare Swizero to every other email app
Same finish line, a different starting point. Here is how Swizero stacks up against the rest.
Ready to stop organizing and start finishing?
Spark sorts email into perfect categories. Swizero gives you a stack you finish in minutes. No credit card. No commitment.