# mathekalk vs Bug Identifier

The clearest difference is in-app purchases: mathekalk at none against Bug Identifier's 3. Bug Identifier's advantage is update cadence (every 9 days vs every 2 months) and iOS requirement (12.0 vs 17). On price, ads and device support there is nothing between them.

Both are free to download. Bug Identifier sells 3 in-app purchases, starting at $4.99 per 7 days. mathekalk asks for nothing beyond the download.

mathekalk ships an update every 2 months, Bug Identifier every 9 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | mathekalk | Bug Identifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (19 ratings)](https://appshunter.io/ios/app/bug-identifier-insect-finder/id6477336669/reviews)** |
| Number of ratings | — | **19** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | — | Freemium |
| Size | 22 MB | 63 MB |
| Requires iOS | 17 | **12.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stephan Engelhard](https://appshunter.io/developer/1542199587) | [Adrian Grotek](https://appshunter.io/developer/1769846014) |

## What reviewers say

### mathekalk

[App page](https://appshunter.io/ios/app/mathekalk/id1542199585)

**Features:** Vision Pro support

**In-app purchases:** none


### Bug Identifier

[App page](https://appshunter.io/ios/app/bug-identifier-insect-finder/id6477336669)

Instantly identify insects by taking a photo or uploading an image. Access a vast database with detailed information on thousands of species. Offers a user-friendly interface for quick and accurate insect recognition.

**Highlights:** Instant AI-powered insect identification, Identify from photo or camera, Extensive database of 7,000+ species, Detailed insect information, User-friendly interface, Ad-free premium experience

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Weekly Subscription | $9.99 | per 7 days |
| Annual Subscription | $49.99 | per year |


## Frequently asked questions

### Is mathekalk free?

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

### Is Bug Identifier free?

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

### Do mathekalk or Bug Identifier have ads?

Neither mathekalk nor Bug Identifier shows ads.

### Which is updated more often, mathekalk or Bug Identifier?

mathekalk ships an update every 2 months, and Bug Identifier every 9 days. Most recently, mathekalk was updated on October 24, 2026 and Bug Identifier on October 24, 2026.

---

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