We analyzed 1,287 negative reviews from the top 5 Email Client apps on the App Store. Here's what users hate most.
Ranked by frequency — how often each complaint appears in negative reviews.
52% of negative reviews mention this issue.
"The app always crashes and I cannot use for email."
"New update keeps crashing. If I leave the app to look at something else, it’ll freeze when I return to it."
43% of negative reviews mention this issue.
"Fullscreen ads, ads inside mails, awful."
"Every time I open the app, I have to look at an ad."
39% of negative reviews mention this issue.
"The search feature is worse than nothing. It fails to find specific emails."
"I’ve given this app so many chances, but the search is so bad I have to cut ties."
29% of negative reviews mention this issue.
"Proton Mail is not safe! They are locking people’s accounts who are activists."
"Privacy laws in Europe are a concern; Proton will likely turnover any information requested."
24% of negative reviews mention this issue.
"The new iOS calendar design is really confusing with numbers floating all over."
"Too many choices/options just make things difficult to decipher."
36% of negative reviews mention this issue.
"Emails haven’t been working for weeks, they don’t sync across devices."
"App doesn’t update; I have to refresh manually multiple times."
Design and usability issues driving negative reviews.
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