# Resistor Plus vs Search PubChem

The clearest difference is review sentiment: Search PubChem at 75% against Resistor Plus's 0%. Search PubChem also leads on price (Free vs $2.99) and update cadence (every 9 months vs every 20 months). Resistor Plus's advantage is iOS requirement (16.6 vs 26.0). On ads and in-app purchases there is nothing between them.

Search PubChem is free to download; Resistor Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Resistor Plus ships an update every 20 months, Search PubChem every 9 months. The most recent releases landed on October 19, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Resistor Plus | Search PubChem |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/search-pubchem/id1369742632/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 0.0% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 9 months** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 9 MB |
| Requires iOS | **16.6** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac, Vision Pro** |
| Age rating | 4+ | 17+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Jae-Seung Lee](https://appshunter.io/developer/1146296876) |

## What reviewers say

### Resistor Plus

[App page](https://appshunter.io/ios/app/resistor-plus/id500615686)

Easily calculate resistor values and tolerance using color codes. Simply select the colors for each band, and the app instantly displays the resistance in ohms. Save your results with screenshots for future reference.

**Highlights:** Resistor color code calculation, Tolerance calculation, Instant results display, Copy result functionality, Screenshot capability, Works on iPhone and iPad, Ad-free and private

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Resistor Plus free?

Resistor Plus costs $2.99, with no in-app purchases.

### Is Search PubChem free?

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

### Do Resistor Plus or Search PubChem have ads?

Neither Resistor Plus nor Search PubChem shows ads.

### Which is updated more often, Resistor Plus or Search PubChem?

Resistor Plus ships an update every 20 months, and Search PubChem every 9 months. Most recently, Resistor Plus was updated on October 19, 2026 and Search PubChem on October 7, 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.*