Call Checker vs thinkMargin
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Call Checker
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.
- Track contact local times
- Avoid bad calling hours
- Check contact availability
- Initiate calls directly (iPhone)
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In a global world it becomes more and more difficult to keep track of the local times of all your important contacts. If you want to avoid to call them at a bad time this application is for you. A quick check tells you whether it's the right time to call or not and who is available at the moment. If you enter the phone number a simple tap on the name is enough to initiate the call (iPhone only).
thinkMargin
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.
- Profit calculation
- Margin calculation
- Cost calculation
- Selling price calculation
- VAT inclusion/exclusion
- Flexible input adjustment
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Calculate your profit, margin, cost or selling price (excl. or incl. VAT) with extreme flexibility, all you have to do is flip the tabs accordingly and the app is smart enough to adjust to your choices e.g you could use either margin or profit to calculate your selling price just flip the tabs
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Call Checker | thinkMargin |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | — | 4.2 (5 ratings) — better |
| Positive reviews | 0.0% of reviews | 83.3% of reviews — better |
| Number of ratings | — | 5 — better |
| Update frequency | Every 23 months | Every 5 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | Piet Jonas | Ahmed ElSenousi |
Customer experience
Call Checker
thinkMargin
In-app purchases
Call Checker
No in-app purchases
thinkMargin
No in-app purchases
Questions
Is Call Checker free?
Is thinkMargin free?
Do Call Checker or thinkMargin have ads?
Which is updated more often, Call Checker or thinkMargin?
Other comparisons
