# Callstack - Cold Call Lists — Easily work through lead lists

> Easily work through lead lists (iPhone/iPad app by Leon Gremer.)

- Source: https://appshunter.io/ios/app/callstack-cold-call-lists/id6819024921 (this page in markdown: same URL + `.md`)
- Developer: [Leon Gremer](https://appshunter.io/developer/6819024923)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 56 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, Polish, European Spanish
- Released: 2026-10-07
- Data updated: 2026-10-24

## What is Callstack?

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 lead lists 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/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Callstack Pro Monthly | $5.99 | per month |
| Callstack Pro Yearly | $59.99 | per year |


## Is Callstack safe?

Not enough ratings yet to assess Callstack.

## Is Callstack legit?

Callstack - Cold Call Lists has limited verification signals. The AppsHunter Legitimacy Score for Callstack is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 4 releases)

### 1.2.0 — 2026-10-18

- Import files can now be opened directly with Callstack, for example, from an email.
- Significantly improved duplicate and column detection during import.
- Added an optional “City” field for leads and imports.
- New languages: Spanish, Polish, French, Italian, and Dutch.
- Improved full-text search.
- UI improvements across several areas.
- Improved workflows and clearer, more helpful error messages.
- Bug fix: Links are no longer detected as phone numbers.

### 1.1.1 — 2026-10-15

- Callback notes are now displayed in the call session before the call begins.
- Bug fix: Selecting “Undo last action” in a call session now resets to the correct status.
- Improved redirection for ratings and reviews.
- German and English app languages are now correctly recognized in the App Store.
- Backups have been technically secured and encrypted.
- Security updates and fixes for known dependencies with CVEs.
- Improvements to performance, code optimization, and stability.

### 1.1.0 — 2026-10-11

New in Version 1.1.0:
- Callback notes are now displayed in the call session before the call begins.
- Bug fix: Selecting “Undo last action” in a call session now resets to the correct status.
- Improved redirection for ratings and reviews.
- Backups have been technically secured and encrypted.
- Security updates and fixes for known dependencies with CVEs.
- Improvements to performance, code optimization, and stability.

### 1.0 — 2026-10-07

No release notes.

## Related topics

[cold calling](https://appshunter.io/ios/topics/cold-calling)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-24.*