Verithiathe honest score on any app
Updated July 2026 · real, multi-region App Store reviews
Head-to-head

Microsoft 365 Copilot vs Microsoft Outlook

Microsoft 365 Copilot 4.7★ · Free + IAP 60
Winner Microsoft Outlook
Microsoft Outlook 4.8★ · Free to download 75

Microsoft Outlook is the more reliable and functional choice for core productivity tasks like email and calendaring, while Microsoft 365 Copilot offers powerful but often inconsistent AI assistance.

Full reviews: Microsoft 365 Copilot · Microsoft Outlook

Microsoft Outlook, with a higher lifetime rating, is generally praised for its core email and calendar functionality, despite some recent glitches and authentication issues. Microsoft 365 Copilot, while revolutionary for some, faces criticism for accuracy, integration problems, and a steep learning curve, often disrupting existing workflows.

Head to head

Features and Functionality edge: Microsoft OutlookR1R2R3R4
Microsoft 365 Copilot Microsoft 365 Copilot is seen as a powerful AI assistant for tasks like writing, research, and administrative duties, with some users finding it revolutionary and a significant help for productivity R2. However, many users report that it lacks essential features, struggles with accuracy, and can even mess up documents R3R4. Some also miss previous functionalities of the Microsoft 365 app before Copilot's integration R1R10.
Microsoft Outlook Microsoft Outlook is highly valued for its core email management, calendar organization, and integration with other Microsoft 365 apps . Users appreciate its fluid operation and lack of crashes . However, recent updates have introduced issues like calendar refreshing problems, difficulty with spell-checking in multiple languages, and missing toolbar options R63. Some users also report poor search functionality and issues with calendar views .
Ease of Use edge: Microsoft OutlookR1R3R6R10
Microsoft 365 Copilot While some users find Copilot's interface user-friendly and easy to experience , many others struggle with its usability. Complaints include a buggy interface, clunky autocorrect, difficulty understanding how to use it, and too many solution paths that are not stepwise R3R6. The forced integration of AI has also made it harder for some to access their documents R1R10R34R49.
Microsoft Outlook Outlook is generally considered easy to use and understand, with good navigation . However, some users find the calendar cumbersome and report glitches with copy/pasting and general slowness . Accessibility issues for visually impaired users have also been noted .
Reliability and Performance tieR3R4R12R13
Microsoft 365 Copilot Microsoft 365 Copilot's reliability is a major concern for users. It is frequently described as glitchy, inaccurate, and prone to mistakes, sometimes even losing work or providing outdated information R3R4R12R13. Users also report issues with login processes and the app not acknowledging existing subscriptions R22.
Microsoft Outlook Outlook generally performs well, with users noting fluid operation and no crashes . However, many recent reviews highlight significant reliability issues, particularly with email delivery and syncing . Frequent logouts and authentication problems are also common, making the app unreliable for critical work R76R88R94.
Price/Value tieR4R10R13R22
Microsoft 365 Copilot Microsoft 365 Copilot is part of the Microsoft 365 ecosystem, which requires a subscription. Some users feel it's not worth the cost given its current state, calling it "garbage" or "useless" R4R10R13R22. There's a sentiment that Microsoft should pay users to use it due to its shortcomings R4.
Microsoft Outlook Microsoft Outlook is free to download, but its full functionality is often tied to a Microsoft 365 subscription for business or advanced features. Users appreciate the value for email and calendar management, especially for school or work . However, some express frustration with the cost when issues arise, particularly regarding lost files or authentication problems .
Support tieR33R53R63R73
Microsoft 365 Copilot Reviews for Microsoft 365 Copilot do not directly mention support experiences, but the lack of tutorials for mobile use and difficulty finding feedback channels suggest potential support gaps R53R33.
Microsoft Outlook Outlook users report difficulty getting help for issues like account recovery or authentication loops, with no clear way to contact a real person at Microsoft R73. Some also mention that the in-app help bar does not provide correct solutions R63.
Pick Microsoft 365 Copilot if

you are looking for an AI assistant to augment your workflow for tasks like drafting, research, and administrative help, and are willing to tolerate occasional inaccuracies and a learning curve R2.

Pick Microsoft Outlook if

you need a robust and generally reliable email and calendar application for managing communications and appointments, especially if you are already integrated into the Microsoft ecosystem .

Evidence note: Both apps have a mix of positive and negative recent reviews, but the negative reviews for Microsoft 365 Copilot often highlight fundamental issues with its AI accuracy and integration, while Outlook's negative reviews tend to focus on specific bugs or authentication frustrations.

Frequently asked

Is Microsoft 365 Copilot useful for work?
Yes, many users find Microsoft 365 Copilot helpful for work tasks such as reviewing correspondence, administrative duties, research, and drafting documents, significantly increasing productivity for some R2. However, others find it unreliable, inaccurate, and not customized for complex corporate structures R4R7R18.
Why is Microsoft Outlook logging me out frequently?
Microsoft Outlook users frequently report issues with being logged out weekly or periodically, often requiring repeated authentication through the Microsoft Authenticator app, which itself can get stuck in a loop R76R88R94R99.
Can I use Microsoft 365 Copilot without AI features?
Recent updates to Microsoft 365 Copilot have integrated AI heavily, with some users expressing frustration that they can no longer easily create or access documents without AI involvement, and that the app has become a "disconnected version" of the Copilot app rather than a central document hub R1R10R34R49.

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. [R1] Microsoft 365 Copilot 2/5 · US What’s Going On?: Remember when Microsoft 365 was actually functional? Before Copilot took over completely? Don’t get me wrong, I use Copilot, a lot…but there’s a specific app for that. I liked Microsoft 365 so I had one stop to open, edit, save documents in my OneDrive without having to download each individual app on my phone. Now this is too integrated and not functional. Sometimes keeping it
  2. [R2] Microsoft 365 Copilot 5/5 · US Revolutionary: Increased MY quality!
  3. [R3] Microsoft 365 Copilot 3/5 · US A bit behind…: 1. Model seems to be behind on docs. Answers are two-to-three versions ago. 2. When giving solutions, it blasts you with too many solution paths. Needs to be more stepwise.
  4. [R4] Microsoft 365 Copilot 1/5 · US By far the dumbest AI: Constantly forget instructions, makes basic mistakes and even lies at time! Don’t ask it anything more than proofreading things or translations. Honestly Microsoft should pay us to use this joke of an AI.
  5. [R6] Microsoft 365 Copilot 3/5 · US Why is this here?: I have no idea how to use this!
  6. [R10] Microsoft 365 Copilot 1/5 · US What is this garbage?: This app used to be a one stop shop for all of my documents in OneDrive. It was convenient for use on an iPhone (since I didn’t want all those apps here). Now it’s a disconnected version of their CoPilot app. I.e. None of the existing CoPilot history appears to be accessible here. tl;dr. This is garbage and if allowed, I would rate it a 0.
  7. [R12] Microsoft 365 Copilot 3/5 · US Getting better: Was glitchy the first time I used it and didnt really get the task or made me repeat what was asked as if I didnt ask. Its much better now since the update and looking forward to the future advancements it will bring.
  8. [R13] Microsoft 365 Copilot 1/5 · US Useless: This feature only messes up what I am doing. It doesn’t appear that it can be removed so I never see it again!!! Now, I’d like to know where is my 365 subscription?
  9. [R22] Microsoft 365 Copilot 1/5 · US Utter garbage: I pay monthly for 365 but this garbage app doesn’t acknowledge my purchase, so I can’t use it.
  10. [R33] Microsoft 365 Copilot 3/5 · GB I like it but...: The lastest version has started hiding parts of answers in little popups that are really awkward and stifle reading flow. Please go back to having the whole answer in-line. It was a 5 but now it's a 3 because it's no longer better than my desktop. (I couldn't find anywhere for feedback in the app so I'm writing here)
  11. [R53] Microsoft 365 Copilot 1/5 · US No tutorial: I just purchased one drive and cannot figure out to edit my docs and photos with no tutorials. Everything you read is directed to using the desktop with browser. We don’t always that available and I need to use the mobile app. Nothing is working. You advertise such ease of use but presume customers have inside information about how to use it. That is not good.
  12. [R63] Microsoft Outlook 3/5 · US New Outlook is Nice but….: Why does it take 3 extra steps to make it so that my email can be spell & grammar checked in Spanish? How do I hard delete emails to skip them going to the “deleted” folder? I ask the help bar & it instructs to hold shift + del but it does not do it, why is that????
  13. [R73] Microsoft Outlook 1/5 · US Bad: stupid idiots can't recover my stolen account
  14. [R7] Microsoft 365 Copilot 2/5 · US Not customized to corporate structure: Still needs to be trained on corporate structure and the lack of database organization by verticals. If you ask it who is the leader of a project, or admin of group, it cannot determine this. If you ask it a simple who is the boss of this vertical it can answer. That is not useful… The ability to search by project, expertise, admin roles, everything not liste
  15. [R18] Microsoft 365 Copilot 3/5 · US Copilot: Sometimes copilot is great! But other times copilot messes up my document so badly that I have to start over and fix the mess. One time copilot reworded everything in a way that was completely wrong and another time I asked copilot to put in bullets exactly as the highlighted example I gave and copilot did then opposite!!
  16. [R76] Microsoft Outlook 1/5 · US Buggy, drains the battery: The app keeps on asking for my email account password at random times and it drains the battery fast. The phone is always warm. I have to delete it. Those needless weekly updates do more damage than good.
  17. [R88] Microsoft Outlook 1/5 · US Logs me out weekly: So work emails are missed until I notice.
  18. [R94] Microsoft Outlook 1/5 · US Authentication is atrocious: If you use this on mobile they make it impossible to authenticate on a single device, the app tries to authenticate on the authentication app via the authentication app. If you have a meeting to get to on mobile and you get signed out good luck. Also the outlook sign in solution also failed. This process all around is a failure.
  19. [R99] Microsoft Outlook 3/5 · GB Good app but Annoying foibles: Great to have Outlook on my mobile. Search is slow but the most annoying feature is logging me out periodically. I have face recognition enabled, so logging out is a pain in the ^%^*
  20. [R34] Microsoft 365 Copilot 1/5 · US Can’t create without AI: I can’t seem to create anything without copilot, which is really annoying. I want to create my own documents, not to have AI create them for me.
  21. [R49] Microsoft 365 Copilot 1/5 · US It sucks: How do I access my apps and files?

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