# Séminaire GDCom vs Ring Sizer

The clearest difference is in-app purchases: Séminaire GDCom at none against Ring Sizer's 15. Séminaire GDCom also leads on iOS requirement (15.0 vs 17.0). Ring Sizer's advantage is update cadence (weekly vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Ring Sizer sells 13 in-app purchases, starting at $4.99 per 7 days. Séminaire GDCom asks for nothing beyond the download.

Séminaire GDCom ships an update every 2 months, Ring Sizer weekly. The most recent releases landed on October 18, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Séminaire GDCom | Ring Sizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (36 ratings)](https://appshunter.io/ios/app/ring-sizer-risi/id6736565382/reviews)** |
| Number of ratings | — | **36** |
| Positive reviews | — | 88.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 60 MB | 20 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Invent-App](https://appshunter.io/developer/1437267222) | [Axel Le Pennec](https://appshunter.io/developer/671697425) |

## What reviewers say

### Séminaire GDCom

[App page](https://appshunter.io/ios/app/seminaire-gdcom/id6450713238)

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

**In-app purchases:** none


### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-risi/id6736565382)

Accurately measure ring and finger sizes from home, ensuring a perfect fit for any occasion. Convert sizes internationally and save measurements for future use. Ideal for online ring purchases, eliminating guesswork.

**Highlights:** Measure ring diameter/circumference, Measure finger width, International size conversions, Save measurements, Share measurements

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Weekly | $4.99 | per 7 days |
| Weekly | $5.99 | per 7 days |
| Weekly | $6.99 | per 7 days |
| Weekly | $6.99 | per 7 days |
| Weekly | $7.99 | per 7 days |
| Yearly | $17.99 | per year |
| Yearly | $24.99 | per year |
| Lifetime | $2.99 | one-time |
| Lifetime | $4.99 | one-time |
| Lifetime | $6.99 | one-time |
| Lifetime | $19.99 | one-time |
| Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is Séminaire GDCom free?

Séminaire GDCom is free to download, with no in-app purchases.

### Is Ring Sizer free?

Ring Sizer is free to download, with in-app purchases available.

### Do Séminaire GDCom or Ring Sizer have ads?

Neither Séminaire GDCom nor Ring Sizer shows ads.

### Which is updated more often, Séminaire GDCom or Ring Sizer?

Séminaire GDCom ships an update every 2 months, and Ring Sizer weekly. Most recently, Séminaire GDCom was updated on October 18, 2026 and Ring Sizer on October 21, 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.*