# RecTool vs ChemKey

RecTool and ChemKey are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. RecTool sells 2 in-app purchases, starting at $2.99 per month and ChemKey sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | RecTool | ChemKey |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | — | Free with in-app purchases |
| Size | 30 MB | 20 MB |
| Requires iOS | **15.6** | 16 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Shanghai Haijia Network Technology Co., Ltd.](https://appshunter.io/developer/1461648668) | [俊锋 仝](https://appshunter.io/developer/1209824000) |

## What reviewers say

### RecTool

[App page](https://appshunter.io/ios/app/rectool/id6757969722)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $2.99 | per month |
| Lifetime Membership | $19.99 | one-time |


### ChemKey

[App page](https://appshunter.io/ios/app/chemkey-chemical-keyboard/id6760772362)

This keyboard app simplifies typing chemical formulas and symbols for students, teachers, and professionals. It offers quick access to common elements and an optimized layout for efficient input, reducing the need to switch between keyboards.

**Highlights:** Dedicated chemical keyboard, Quick access to chemical symbols, Optimized layout for expressions, Faster formula input, Smart completion (VIP feature), One-time purchase for lifetime access

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ChemKey Pro (Lifetime) | $2.99 | one-time |


## Frequently asked questions

### Is RecTool free?

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

### Is ChemKey free?

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

### Do RecTool or ChemKey have ads?

Neither RecTool nor ChemKey shows ads.

### Which is updated more often, RecTool or ChemKey?

RecTool ships an update every 3 months, and ChemKey every 3 months. Most recently, RecTool was updated on October 24, 2026 and ChemKey on October 24, 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.*