# Call Checker vs Basis Weight To Grammage

The clearest difference is review sentiment: Basis Weight To Grammage at 100% against Call Checker's 0%. On price, update cadence, ads and in-app purchases there is nothing between them.

Call Checker costs $0.99 and Basis Weight To Grammage $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, Basis Weight To Grammage every 38 months. The most recent releases landed on October 29, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Call Checker | Basis Weight To Grammage |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 23 months** | Every 38 months |
| Monetization | Paid | Paid |
| Size | 2 MB | 1 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Piet Jonas](https://appshunter.io/developer/288060167) | [Manfred Breede](https://appshunter.io/developer/414696754) |

## 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


### Basis Weight To Grammage

[App page](https://appshunter.io/ios/app/basis-weight-to-grammage/id416451122)

Easily convert paper's basis weight to grammage (GSM) without needing to know specific paper sizes. Simply enter the basis weight and select the paper category for instant conversion.

**Highlights:** Basis weight to GSM conversion, Supports 8 paper categories, No need to know paper size, Minimal user input required, Quick and easy conversions

**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 Basis Weight To Grammage free?

Basis Weight To Grammage costs $0.99, with no in-app purchases.

### Do Call Checker or Basis Weight To Grammage have ads?

Neither Call Checker nor Basis Weight To Grammage shows ads.

### Which is updated more often, Call Checker or Basis Weight To Grammage?

Call Checker ships an update every 23 months, and Basis Weight To Grammage every 38 months. Most recently, Call Checker was updated on October 29, 2026 and Basis Weight To Grammage on October 16, 2026.

---

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