# Watts vs Inductor Design Pro

The clearest difference is in-app purchases: Watts at none against Inductor Design Pro's 1. Watts also leads on iOS requirement (8.0 vs 15.0). Inductor Design Pro's advantage is update cadence (every 3 weeks vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Inductor Design Pro sells 1 in-app purchase, starting at $29.99 per year. Watts asks for nothing beyond the download.

Watts ships an update every 4 months, Inductor Design Pro every 3 weeks. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Watts | Inductor Design Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/watts/id958596712/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 1 MB | 9 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Code Smart LLC](https://appshunter.io/developer/460440673) | [建忠 徐](https://appshunter.io/developer/1871049057) |

## What reviewers say

### Watts

[App page](https://appshunter.io/ios/app/watts/id958596712)

Calculate the cost of running electrical devices over time. This simple tool helps you understand your energy consumption expenses.

**Highlights:** Calculate device running costs, Easy to use interface, Track energy expenses over time, Simple utility tool

**Features:** macOS Compatibility

**In-app purchases:** none


### Inductor Design Pro

[App page](https://appshunter.io/ios/app/inductor-design-pro/id6758878884)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription | $29.99 | per year |


## Frequently asked questions

### Is Watts free?

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

### Is Inductor Design Pro free?

Inductor Design Pro is free to download, with in-app purchases available.

### Do Watts or Inductor Design Pro have ads?

Neither Watts nor Inductor Design Pro shows ads.

### Which is updated more often, Watts or Inductor Design Pro?

Watts ships an update every 4 months, and Inductor Design Pro every 3 weeks. Most recently, Watts was updated on November 1, 2026 and Inductor Design Pro on October 31, 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.*