# sketchometry vs ID

The clearest difference is in-app purchases: sketchometry at none against ID's 1. sketchometry also leads on update cadence (every 10 days vs every 3 months). ID's advantage is review sentiment (82% vs 65%) and iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. ID sells 1 one-off in-app purchase. sketchometry asks for nothing beyond the download.

sketchometry ships an update every 10 days, ID every 3 months. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | sketchometry | ID |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/sketchometry/id635195332/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 65.0% of reviews | **81.8% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 82 MB | 17 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Universitaet Bayreuth](https://appshunter.io/developer/926230632) | [INITREE Software GmbH](https://appshunter.io/developer/1309493226) |

## What reviewers say

### sketchometry

[App page](https://appshunter.io/ios/app/sketchometry/id635195332)

This app transforms your finger drawings into precise geometric shapes on your iPhone or iPad. It turns math into an experimental subject, encouraging learners to discover concepts through hands-on interaction rather than presenting pre-made solutions.

**Highlights:** Finger-to-geometry conversion, Dynamic mathematical exploration, Experimental learning approach, Interactive geometric drawing, Supports iPhone and iPad

**Features:** macOS Compatibility

**In-app purchases:** none


### ID

[App page](https://appshunter.io/ios/app/id-logics/id1309493227)

Easily identify species with this intelligent app. It asks targeted questions based on observable characteristics to help you determine plants and animals. Discover nature's diversity offline, with helpful guides and the ability to log your findings.

**Highlights:** Intelligent questioning for easy identification, Offline functionality, Supports multiple species groups, Interactive and error-tolerant, Visual and textual verification aids, Log sightings with GPS and photos

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bäume und Sträucher | $2.99 | one-time |


## Frequently asked questions

### Is sketchometry free?

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

### Is ID free?

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

### Do sketchometry or ID have ads?

Neither sketchometry nor ID shows ads.

### Which is updated more often, sketchometry or ID?

sketchometry ships an update every 10 days, and ID every 3 months. Most recently, sketchometry was updated on October 12, 2026 and ID on October 13, 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.*