# Search PubChem vs Thullium

The clearest difference is update cadence: Thullium at every 3 weeks against Search PubChem's every 9 months. Thullium also leads on iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Search PubChem ships an update every 9 months, Thullium every 3 weeks. The most recent releases landed on October 7, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Search PubChem | Thullium |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/search-pubchem/id1369742632/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 9 MB | 5 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad, Mac, Vision Pro | iPhone, iPad, Mac, Vision Pro |
| Age rating | 17+ | 4+ |
| Developer | [Jae-Seung Lee](https://appshunter.io/developer/1146296876) | [Richard Simonik](https://appshunter.io/developer/1707862972) |

## What reviewers say

### Search PubChem

[App page](https://appshunter.io/ios/app/search-pubchem/id1369742632)

Access and manage chemical compound data from the PubChem database. Search for over 111 million compounds, view molecular formulas, weights, and structures, and create and track custom solutions with detailed composition information.

**Highlights:** Search PubChem database, View molecular formula, weight, and structure, Store compound information, Create and manage custom solutions, Track solution composition in grams and moles, Display 3D compound structures, Share solution data via CSV

**In-app purchases:** none


### Thullium

[App page](https://appshunter.io/ios/app/thullium/id6466820347)

**In-app purchases:** none


## Frequently asked questions

### Is Search PubChem free?

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

### Is Thullium free?

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

### Do Search PubChem or Thullium have ads?

Neither Search PubChem nor Thullium shows ads.

### Which is updated more often, Search PubChem or Thullium?

Search PubChem ships an update every 9 months, and Thullium every 3 weeks. Most recently, Search PubChem was updated on October 7, 2026 and Thullium on October 25, 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.*