Slack Desktop App Slower and Heavier Than Its Web Version
Daily Slack users consistently report that the Electron-based desktop app is slower and more resource-intensive than the web client, with the mobile app offering inferior UX compared to both. This performance gap frustrates power users who rely on Slack for high-volume communication. The structural issue reflects Electron limitations rather than a missing feature.
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Similar Problems
surfaced semanticallySlack feels visually basic and Huddles audio breaks up on capable hardware
Reviewers describe the Slack experience as flat compared with peers and report Huddles latency or voice break despite running on high-spec devices. The platform underuses available device capabilities.
Slack Performance Has Steadily Degraded Over Months
A Slack user describes performance continuously dropping over several months: the app has become glitchy and unreliable, files take much longer to load, messages don't sync until a channel is opened, and notifications arrive late.
Slack mobile app has unreliable uploads and duplicate notifications
A long-time Slack user reports the mobile app's UI does not follow standard mobile conventions, image uploads fail intermittently with unclear error states, and notifications fire on phone even when the desktop client is already active.
Slack Mobile App Runs Slow and Drains Battery During Meetings
A Slack user reports that the mobile app becomes sluggish during meetings, causing the phone to overheat and the battery to drain quickly. The user describes it as one of the worst communication apps they have used and would abandon it if not required for work, signaling strong dissatisfaction with mobile performance.
Slack Mobile App Drains Battery and Causes Missed Critical Messages
The Slack mobile app is heavy on battery consumption and notification unreliability causes users to miss important messages. These are compounding problems — high drain discourages background use while poor notification logic reduces message-receive reliability. Affects all mobile-first or hybrid workers.
Problem descriptions, scores, analysis, and solution blueprints may be updated as new community data becomes available.