Callstack - Cold Call Lists

Simplify your cold calls

Only for iPhone

Free · In‑App Purchases

iPhone

Import Excel or CSV call lists, work through leads efficiently, and stay organized - without CRM clutter. Callstack makes cold calling simple. Import your existing call lists from Excel or CSV and work through them one by one - without a bloated CRM, without an account, and without complicated setup. During a call session, Callstack only shows you the next lead. Make the call, add a note if needed, set the right status, and move straight to the next one. Your workflow in Callstack: - Select an Excel or CSV file - Automatically detect and map columns - Automatically filter duplicate phone numbers - Call leads one by one - Save statuses and notes immediately - Keep callbacks and appointments clearly separated Available statuses: - Open - No anwser - Call back - Not interested - Appointment Callstack is intentionally not a traditional CRM. It focuses on one job: helping you work through call lists quickly and clearly. Your lead and sales data stays stored locally on your device. No Callstack account is required to use the app. You can import as many leads as you want. The first 30 processed leads are free. After that, Callstack Pro unlocks unlimited processing. Callstack is ideal for freelancers, sales teams, and anyone who regularly works with cold calls or structured outbound calling. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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The developer, Leon Gremer, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

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Information

Seller
Leon Gremer
Size
58.6 MB
Category
Utilities
Compatibility
Requires iOS 16.4 or later.
  • iPhone
    Requires iOS 16.4 or later.
Languages
English
Age Rating
4+
In-App Purchases
Yes
  • Callstack Pro Yearly $59.99
  • Callstack Pro Monthly $5.99
  • Learn More
Copyright
© 2026 Leon Gremer
  • Developer Website
  • Privacy Policy