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Updated July 2026 · real, multi-region App Store reviews
Head-to-head

Spark Mail vs Mailchimp Email Marketing

Spark Mail 4.6★ · Free + IAP 70
Winner Spark Mail
Mailchimp Email Marketing 4.9★ · Free + IAP 55

For general email management, Spark Mail offers a more comprehensive and feature-rich experience, despite recent performance issues, while Mailchimp is better suited for email marketing campaigns, though its mobile app has significant login and functionality limitations.

Full reviews: Spark Mail · Mailchimp Email Marketing

Spark Mail is a powerful email client praised for its organization, AI features, and cross-device syncing, but it faces criticism for recent bugs, performance issues, and paywalled basic features. Mailchimp Email Marketing is highly regarded for campaign management and ease of use on desktop, but its mobile app is plagued by login problems, limited functionality, and strict iOS version requirements.

Head to head

Features & Functionality edge: Spark MailR4R10R11R14
Spark Mail Spark Mail is praised for its organizational tools, such as smart inbox and the ability to snooze emails, and its AI features for finding emails and managing spam R11R14R17. However, users report missing core functionality like viewing only unread messages or blocking senders behind a paywall R4R21R51. Recent updates have added AI features and a calendar, which some users find make the app bloated and less focused on core email tasks R10. There are also complaints about the lack of a 'reply all' option in the latest version and issues with translation features being removed .
Mailchimp Email Marketing Mailchimp is valued for its ease of use in managing and sending email campaigns, adding contacts, and checking campaign performance on the go . However, the mobile app is criticized for missing crucial features available on the desktop, such as the inability to resend to select audience members, delete assets, or exclude recipients from campaigns . The editor is described as awful, with issues like the keyboard disappearing, random font changes, and inability to move or delete sections .
Ease of Use & UI edge: Spark MailR2R9R10R12
Spark Mail Spark Mail is generally considered easy to use and navigate, with a clean layout and functional UI . However, some users find the search function unintuitive and less effective than native mail apps R2R9. Recent updates have introduced a cluttered UI with an AI search bar that some users dislike R10R12. There are also complaints about difficulties customizing the order of actions and finding folders after reloading the app .
Mailchimp Email Marketing Mailchimp is frequently praised for being easy to use for basic tasks like sending emails and managing contacts . However, many users find the mobile editor difficult to use, with issues like the keyboard disappearing and inability to move or delete sections . Some users also report that the app is not intuitive for completing tasks .
Reliability & Performance tieR1R3R7R9
Spark Mail Spark Mail users report significant reliability and performance issues, especially in recent months. Common complaints include the app locking up, getting stuck, taking a long time to load, and emails not loading or scrolling properly R1R7R9R13. Some users attribute these issues to the addition of AI features and bloat R10. Battery drain is also a concern R3. Notifications sometimes fail to work .
Mailchimp Email Marketing Mailchimp's mobile app is frequently criticized for being unreliable and not working. Many users report being unable to log in, especially if they used Google Login on desktop R66. The app also suffers from issues like pages being slow to load, the editor being glitchy, and email templates failing to load . Some users experience the app overheating their phone .
Price & Value tieR4R6R17R18
Spark Mail Spark Mail offers a free tier, which many users find sufficient for personal use . However, several basic features, such as blocking senders, creating smart folders, and viewing only unread messages, are paywalled, leading to frustration R4R6R21R28. Some users feel the paid subscription is too expensive for the features offered, especially when free alternatives exist R17R18R28R30.
Mailchimp Email Marketing Mailchimp offers a free version, which some users find amazing for small lists and missionary letters . However, many users criticize the platform for increasing prices without significant new features, making it overpriced . There are also complaints about being forced to pay more or being unable to downgrade accounts . The free account on mobile is described as having extremely limited functionality and not working properly .
Compatibility & Support edge: Spark MailR8R15R16R37
Spark Mail Spark Mail is generally available across multiple platforms (iOS, Android, PC, Mac) and users appreciate its cross-device syncing . However, some users report desktop issues requiring repeated sign-ins and slow loading on Windows . There are also reports of the app refusing service based on the user's country of residence R16R37. Issues with contact integration R8 and M365 account setup R15 are also mentioned.
Mailchimp Email Marketing Mailchimp's mobile app has significant compatibility issues, particularly with iOS versions. Recent updates require iOS 17, rendering older but functional devices unusable and trapping users in an update loop R75R78R97R100. Customer support is described as horrendous, slow to respond, and unhelpful, often sending canned messages . The lack of Google Login on the mobile app is a major barrier for many users who signed up via Google on desktop R66R70R79R82.
Pick Spark Mail if

You need a robust email client for managing multiple accounts with strong organization features, AI assistance, and cross-device syncing, and are willing to tolerate occasional bugs and potentially pay for advanced features R11R14.

Pick Mailchimp Email Marketing if

You primarily manage email marketing campaigns and need to check stats or add contacts on the go, and you are comfortable using the desktop version for campaign creation and advanced editing due to mobile app limitations .

Evidence note: Recent reviews for Spark Mail are heavily skewed negative, focusing on performance issues and paywalled features, contrasting with its higher lifetime rating which likely reflects earlier versions. Mailchimp's mobile app reviews are consistently negative regarding login and functionality, despite a high lifetime rating that probably reflects the overall platform's desktop experience.

Frequently asked

Does Spark Mail have a free version?
Yes, Spark Mail offers a free tier, which many users find sufficient for regular personal use, though some core features like blocking senders and creating smart folders are paywalled R21R28R30R51.
Can I use Mailchimp's mobile app if I signed up with Google Login?
Many users report that if they signed up for Mailchimp on desktop using Google Login, they are unable to log in to the mobile app, as the app does not offer a Google Login option R66R70R79R82.
Are there performance issues with Spark Mail?
Yes, many recent reviews indicate that Spark Mail has become buggy and slow, with users reporting the app locking up, emails not loading, scrolling issues, and significant battery drain, especially on newer iPhones R1R3R7R13.
Does Mailchimp's mobile app require the latest iOS?
Yes, recent updates to the Mailchimp mobile app require iOS 17.0 or later, which has made the app unusable for many users with older, but still functional, iPhones and iPads, often trapping them in an update loop R75R78R97R100.

What reviewers actually said

Built only from these 120 real reviews (foreign ones translated). Superscripts jump to the quote here. Apple has no per-review links, so [ref] opens that app's reviews on the App Store.

  1. [R4] Spark Mail 2/5 · US Missing core functionality: No way to view only unread messages. Feel like that’s a pretty major oversight. This is not something that should be put behind a paywall, that’s just sleazy.
  2. [R10] Spark Mail 2/5 · US Long time user: At this point, this is no longer an email app. It is so bloated with AI slop that I can barely read an email anymore. I will be looking for alternatives, disappointing as I really love supporting this team. But I guess priorities are now on AI and not helping me read and reply to emails.
  3. [R11] Spark Mail 5/5 · US It just gets better: I’ve been using Spark several years now. I started with it because SPAM was out of control and Spark had a positive control over senders feature. Getting through all the senders was a slog but after that 100% control! Then they added AI for finding emails and whatnot. No more am I anxious I cannot find an email. I went from the most disorganized person to the one everyone reli
  4. [R14] Spark Mail 5/5 · US Solid app!: Makes it easier to focus when I get into my inbox
  5. [R2] Spark Mail 4/5 · US Mostly good, could be better: Mostly good but does not do a good job of search. It frequently leaves out older emails and the sort order it presents emails in is unintuitive. I often resort to the default Mail app when I need to search for an email.
  6. [R9] Spark Mail 3/5 · US Nice most of the time, but attention to detail is lacking: Using spark is a pleasant experience 99% of the time. But there are a lot of bugs and small things that annoy, the app randomly freezes on a white screen, emails aren’t cached and take a while to load, search is noticeably worse quality than Gmail, and emails with wide HTML content can’t be zoomed out or scrolled horizontally. I still use
  7. [R12] Spark Mail 3/5 · US Great App but.....: This app is great overall. However, I hope the developers remove the AI search bar from the bottom of the IOS app and make it cleaner. I also use a Galaxy as my personal phone, and the Spark app looks much cleaner, especially with the AI search. Please make this change.
  8. [R1] Spark Mail 1/5 · US Locks up and gets stuck every day on brand new iPhone 17 pro max, daily.: I have been using Spark email solely for five years. Locks up and gets stuck every day on brand new iPhone 17 pro max, daily. It started screwing up on my iPhone 13 Pro, this year. It is not much better on my new 17 Pro Max.
  9. [R3] Spark Mail 3/5 · US Useful, but it drains the battery too much, so I uninstalled it. It used almost half my battery. · translated
  10. [R7] Spark Mail 1/5 · US Was great, now useless: This app used to be an amazing email app now on an iPhone 13 running iOS 26.5 it is virtually unusable. I have uninstalled and reinstalled the app over a dozen times and it’s still only loads about 1/3 of the time. And when it does load it takes 10 times longer than any other app out there ** if you don’t have the absolute newest iPhone, and a ton of patience, you might as
  11. [R6] Spark Mail 3/5 · US Paywalled: For trying to set up a Smart Folder, when search folders are free in outlook? Nope. (I’d just use outlook for everything but would like to use a separate app for work and personal)
  12. [R17] Spark Mail 4/5 · US Amazingly helpful: Being someone with executive functioning issues having Spark and especially the AI to help me has made life a little easier. I gave it 4 stars due the price for everything included. As someone waiting for a disability case to be approved it’s hard to afford and I will probably have to find something similar eventually.
  13. [R18] Spark Mail 3/5 · US Good, just not quite enough of an improvement: I’m using Apple Mail on MacOS and iOS and been disappointed in the search feature not being consistent and the categorization feature usability lacking. Spark does those things obviously better…just not enough better for paying that much more.
  14. [R8] Spark Mail 4/5 · US Fix Adding Recipients To Email: Lately, I’ve noticed that when I go to compose an email and start typing in the “to” line, no names populate for me to pick. I have “full access” to contacts enabled but it doesn’t pull any names to me to view or choose. Can this please be fixed?
  15. [R15] Spark Mail 3/5 · US Back to Apple Mail: 5/8/26 - This app is just too gmail centric, and, Apple mail has grown up a lot, and, no having to jump through 3rd party password hoops. 2015 - I’ve used Airmail for the best part of six years and it just kept getting more and more tedious to work with. So, I went hunting and re-found Spark. If you’re an Airmail refugee and reading this right now, I’d take a good long look at
  16. [R16] Spark Mail 1/5 · US peace in non-politics: This app refuses service based on the user’s country of residence. After installation, I was shown a message stating that services are not provided in Russia and Belarus, and that users from these countries are no longer accepted. I consider this discriminatory and unacceptable for an email service, which should function as a neutral communication tool. If the developers d
  17. [R37] Spark Mail 1/5 · US do not use it: This app is not about email, but about politics and paid subscriptions; it has very aggressive marketing.
  18. [R21] Spark Mail 3/5 · US Overall this is GREAT!: I have used Spark for almost a decade now. I love everything about it. I will say, I strongly dislike the fact that you have to pay for a subscription in order to block a sender. One of the most basic worldwide email functions is blocked unless you pay a monthly fee. I am considering jumping ship and moving to another email because of this.
  19. [R28] Spark Mail 1/5 · US Great app: That is so easy I can’t go back the Apple mail because I forgot how it works haha. That was before I got a $100 bill to get mail. I just couldn’t justify spending this much on getting email when I could do the same for free. It may not be as streamlined as Spark but the final result is the same.
  20. [R30] Spark Mail 3/5 · US Nice app but… subscription.: Spark emailed is a clean and well-crafted email client that features easy email manipulation. However, it’s hard to recommend because you’ll be paying yearly forever due to their subscription service. It’s good but not that good. There are too many great free options that have some of the same features as Spark.
  21. [R51] Spark Mail 3/5 · US Great Organization, Gotta Pay for Everything Else: This email app is great, especially the layout and organization. However, I hate the fact that you need to pay for yet another subscription to have the ability to block spam emails. For what it is, it's not cheap. The other painfully obvious flaw is the inability to add or create new folders. I think there's a way to do it, but it's buried in the
  22. [R66] Mailchimp Email Marketing 3/5 · US No Google Login???: Can’t log in because I created my account on desktop with Google login, which does not exist on this app. Can’t add a password on desktop so I can log in on the app. Catch 22 makes this app pointless, for me at least. I’m sure it works great for someone out there that can actually log in.
  23. [R70] Mailchimp Email Marketing 1/5 · US No access to Google Login: I signed up via Google Login, and the app has no access to login via Google so cannot use it. Love mailchimp otherwise, but the app becomes useless without this feature.
  24. [R79] Mailchimp Email Marketing 1/5 · US Can’t log in with Google: Why offer this option if it doesn’t work everywhere??
  25. [R82] Mailchimp Email Marketing 1/5 · US Login sucks: If you signed up via google email you will no be able to login on the mobile app. Ridiculous that I pay for this and can’t even access without a computer.
  26. [R13] Spark Mail 1/5 · US Sub par experience in the last few months: Not sure what happened, but recently that app has been buggy and I keep checking the App Store for updates. Currently, any email that I open has the Accept and Block button overlay gets stuck while scrolling the email, the only way to get out of it is to close the app and reopen. This is extremely frustrating and happens on a regular basis.
  27. [R75] Mailchimp Email Marketing 3/5 · US Limited functionality: Only allows you to use the app if you have the most recent iOS. Sounds reasonable on the surface but when iOS has flaws that impact functioning aside from this app and one needs to temporarily use previous iOS this a limitation. As one who has developed apps it is absolutely possible to have a broader range of flexibility on app functioning.
  28. [R78] Mailchimp Email Marketing 3/5 · US I can no longer use the app: I’ve been using Mailchimp since 2019. Now, all of a sudden I can’t use it anymore because I don’t have a newer iPhone. I was just using the app last week. Can this be fixed?????? I don’t and can download iOS 17 on my older phone
  29. [R97] Mailchimp Email Marketing 1/5 · US App upgrade fail: Time to find a new software. We’ve been a paid Mailchimp customer for several years and use the app at live events on multiple company-owned iPads to collect attendees and manage follow-ups. The latest app update now requires iOS 17, which instantly made all of our older but fully functional iPads unusable. The bigger issue is that the app forces an update loop. It will not al
  30. [R100] Mailchimp Email Marketing 1/5 · US Update requires iOS 17.0 or later, not able to use: I own an iPad Air 2, which I realize is dated, but is still functional. I use it for much of my early morning work, and remotely in coffee shops. Previous versions of Mailchimp allowed me to easily re-send campaigns to un-opened emails OR new subscribers. This Mailchimp app upgrade requires iOS 17.0 or later, which doesn’t work for my situation.

Synthesized from 120 recent App Store reviews · updated July 2026 · View on the App Store