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Spark Mail: AI Email Assistant: what 171 low-star reviews complain about

We read 171 one-to-three-star reviews written between 2026-01-25 and 2026-09-05 and kept the ones that describe a specific unmet need. Grouped with reviews of other apps that say the same thing, they land in 12 repeated complaints. Store listing.

What reviewers complain about

• Unwanted calendar integration×2
• Scrolling issues×2
• No cache removal button×2
• 432mb app size×2
• 1.81gb documents data×2
• Worried it is doing stuff i do not want
• Wipes user settings
• Wide html content cannot zoom or scroll horizontally
• Weekly re-authentication required
• Virtually unusable on non-newest iphones

The opportunities these reviews point to

1. 0181Reliable email client prioritizing core functionality over AI17 of 31
2. 0279Locked — subscribe to read this opportunity10 of 73
3. 0368Locked — subscribe to read this opportunity4 of 9
4. 0470Locked — subscribe to read this opportunity3 of 6
5. 0562Locked — subscribe to read this opportunity2 of 6
6. 0662Locked — subscribe to read this opportunity2 of 4
7. 0759Locked — subscribe to read this opportunity2 of 5
8. 0858Locked — subscribe to read this opportunity2 of 4
9. 0952Locked — subscribe to read this opportunity2 of 3
10. 1049Locked — subscribe to read this opportunity2 of 2
11. 1147Locked — subscribe to read this opportunity2 of 2
12. 1247Locked — subscribe to read this opportunity2 of 2

Score out of 100, then how many of the cluster's reviews are about this app out of its total. Category: Email client.