# CheckCheck App vs Per Gram Calculator

The clearest difference is in-app purchases: Per Gram Calculator at none against CheckCheck App's 5. Per Gram Calculator also leads on iOS requirement (13.0 vs 15). CheckCheck App's advantage is ads (none vs shown) and update cadence (fortnightly vs every 11 months). On price, review sentiment and device support there is nothing between them.

Both are free to download. CheckCheck App sells 5 in-app purchases, starting at $8.99 per 7 days. Per Gram Calculator asks for nothing beyond the download.

CheckCheck App ships an update fortnightly, Per Gram Calculator every 11 months. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | CheckCheck App | Per Gram Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (7.2K ratings)](https://appshunter.io/ios/app/checkcheck-app/id1486562900/reviews)** | — |
| Number of ratings | **7.2K** | — |
| Positive reviews | 93.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 11 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Best chart rank | **#15** | — |
| Size | 95 MB | 17 MB |
| Requires iOS | 15 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CheckCheck LLC](https://appshunter.io/developer/1648560975) | [Kouji Yamauchi](https://appshunter.io/developer/1519365107) |

## What reviewers say

### CheckCheck App

[App page](https://appshunter.io/ios/app/checkcheck-app/id1486562900)

**Currently charting:** #15 Top Grossing · Shopping (US App Store)

Verify the authenticity of sneakers, handbags, and other luxury items quickly and accurately. Get results in minutes, backed by professional authenticators and a Certificate of Authenticity. Protect your investments and combat counterfeits.

**Highlights:** Fast authentication results, Authenticates sneakers and handbags, Double-checked by professional authenticators, Certificate of Authenticity provided, Global user base

**Features:** Apple Wallet, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CheckCheck Weekly Premium Plan B | $8.99 | per 7 days |
| CheckCheck Weekly Premium Plan A | $8.99 | per 7 days |
| CheckCheck Monthly Premium Plan B | $29.99 | per month |
| CheckCheck Monthly Premium Plan C | $29.99 | per month |
| CheckCheck Monthly Premium Plan A | $29.99 | per month |

**What reviewers like**

- 🚀 Fast and efficient
- 🔒 Reliable authentication
- 👍 User-friendly interface
- 🚀 Quick response times
- 🚀 Accurate results

**What reviewers complain about**

- 🐛 Occasional inaccurate results
- 🐛 Slow response times in some cases
- 🐛 Lack of detailed explanations for failed checks
- 🐛 Buggy app performance and crashes
- 🐛 Poor customer support responsiveness

**Reported bugs**

- Inability to sign up or create an account
- Inconsistent authentication results
- Delayed or non-existent responses for paid checks
- Billing and payment processing issues

**Requested features**

- Expand authentication to more brands and product types
- Provide more detailed feedback on authentication results
- Improve app stability and reduce bugs
- Enhance customer support and communication


### Per Gram Calculator

[App page](https://appshunter.io/ios/app/per-gram-calculator/id1523612245)

Easily compare the cost of multiple products by calculating their price per gram or weight per unit of currency. This free tool helps you determine the most economical option when shopping, even with different weights and prices. It supports flexible unit conversions for weight, length, and volume.

**Highlights:** Calculate price per gram, Calculate weight per yen, Compare multiple products, Flexible unit conversions (weight, length, volume), Automatic input field expansion, Exclude blank entries from comparison

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CheckCheck App free?

CheckCheck App is free to download, with in-app purchases available.

### Is Per Gram Calculator free?

Per Gram Calculator is free to download, with no in-app purchases.

### Do CheckCheck App or Per Gram Calculator have ads?

Per Gram Calculator shows ads; CheckCheck App does not.

### Which is updated more often, CheckCheck App or Per Gram Calculator?

CheckCheck App ships an update fortnightly, and Per Gram Calculator every 11 months. Most recently, CheckCheck App was updated on October 24, 2026 and Per Gram Calculator on October 7, 2026.

---

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