# Call Checker vs thinkMargin

The clearest difference is review sentiment: thinkMargin at 83% against Call Checker's 0%. thinkMargin also leads on update cadence (every 5 months vs every 23 months) and iOS requirement (11.0 vs 15.6). Call Checker's advantage is ads (none vs shown). On price, in-app purchases, monetization model and device support there is nothing between them.

Call Checker costs $0.99 and thinkMargin $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Call Checker ships an update every 23 months, thinkMargin every 5 months. The most recent releases landed on October 9, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Call Checker | thinkMargin |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/thinkmargin/id1042241713/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 0.0% of reviews | **83.3% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 23 months | **Every 5 months** |
| Monetization | Paid | Paid |
| Size | 2 MB | 63 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Piet Jonas](https://appshunter.io/developer/288060167) | [Ahmed ElSenousi](https://appshunter.io/developer/885807943) |

## What reviewers say

### Call Checker

[App page](https://appshunter.io/ios/app/call-checker/id292434428)

Easily track the local times of your international contacts to avoid calling at inconvenient hours. Quickly see who is available and initiate calls directly from the app.

**Highlights:** Track contact local times, Avoid bad calling hours, Check contact availability, Initiate calls directly (iPhone)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### thinkMargin

[App page](https://appshunter.io/ios/app/thinkmargin/id1042241713)

Calculate profit, margin, cost, or selling price with VAT options. This flexible tool adjusts calculations based on your input, allowing you to determine selling price using either margin or profit.

**Highlights:** Profit calculation, Margin calculation, Cost calculation, Selling price calculation, VAT inclusion/exclusion, Flexible input adjustment

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Call Checker free?

Call Checker costs $0.99, with no in-app purchases.

### Is thinkMargin free?

thinkMargin costs $0.99, with no in-app purchases.

### Do Call Checker or thinkMargin have ads?

thinkMargin shows ads; Call Checker does not.

### Which is updated more often, Call Checker or thinkMargin?

Call Checker ships an update every 23 months, and thinkMargin every 5 months. Most recently, Call Checker was updated on October 9, 2026 and thinkMargin on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*