I’ve been a Spark Premium subscriber for several years, using it daily for critical business and client communications. Unfortunately, the app has gone sharply downhill, and Readdle’s handling of issues has been extremely disappointing.1. Paid "Bug" Features Removed Without NoticeSpark quietly removed Read Statuses (read receipts) from my active Premium plan — a feature I relied on for over a year. Support later claimed it was a “bug” that I had access at all, and informed me it now requires the far more expensive Pro plan. Removing an existing paid feature and re-locking it behind a higher tier feels misleading and unethical.2. Serious, Ongoing BugsSpark has repeatedly sent scheduled emails even after I deleted them — more than five times — including sensitive reminders to clients. This caused real reputation damage and embarrassed me professionally.On top of that, the app crashes frequently on both iOS and Windows, often while I’m writing important emails, wiping out drafts. Sync delays, random freezes, and unreliable search add to the frustration.Its just an unstable and unreliable application - not a device related issue its a software related issue - when they send app updates 1-2 a week expect instability. 3. Support Has Not Provided Real SolutionsDespite months of tickets and follow-ups, support has not resolved any of these issues. I mostly received generic responses, no accountability, and no timeline for fixes - I've reported 5-7 major bugs. Today, it’s unstable, unreliable, and feels like it’s being monetized aggressively at the expense of long-time customers. I can no longer recommend it to anyone who needs dependable email for business.Avoid this product.
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