# BTWATTCH vs Calculator+

The clearest difference is update cadence: BTWATTCH at every 2 months against Calculator+'s every 9 months. BTWATTCH also leads on iOS requirement (9.0 vs 16.0). 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.

BTWATTCH ships an update every 2 months, Calculator+ every 9 months. The most recent releases landed on September 22, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | BTWATTCH | Calculator+ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 9 months |
| Size | 1 MB | 5 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RATOC Systems, Inc.](https://appshunter.io/developer/568725272) | [n1system ltd.](https://appshunter.io/developer/323684909) |

## What reviewers say

### BTWATTCH

[App page](https://appshunter.io/ios/app/btwattch/id887695333)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calculator+

[App page](https://appshunter.io/ios/app/calculator-plus/id1566994328)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BTWATTCH free?

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

### Is Calculator+ free?

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

### Do BTWATTCH or Calculator+ have ads?

Neither BTWATTCH nor Calculator+ shows ads.

### Which is updated more often, BTWATTCH or Calculator+?

BTWATTCH ships an update every 2 months, and Calculator+ every 9 months. Most recently, BTWATTCH was updated on September 22, 2026 and Calculator+ on September 11, 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.*