# leaDCalc vs Prompt Stock

The clearest difference is update cadence: Prompt Stock at every 3 days against leaDCalc's every 7 months. 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.

leaDCalc ships an update every 7 months, Prompt Stock every 3 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | leaDCalc | Prompt Stock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/leadcalc/id1487509498/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 159 MB | 1 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Vaughn Warriner](https://appshunter.io/developer/1487509497) | [Yasuyuki Arata](https://appshunter.io/developer/1896504912) |

## What reviewers say

### leaDCalc

[App page](https://appshunter.io/ios/app/leadcalc/id1487509498)

This app calculates DC power lead sizes for telephone company central office power plants. It uses a circular slide rule format to determine allowable voltage drops and wire sizes based on specific system parameters.

**Highlights:** Circular slide rule format, Calculates allowable voltage drops, Determines DC power lead sizes, Supports 48V and 24V DC systems, References Bell System calculations, Informational use guide

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

**In-app purchases:** none


### Prompt Stock

[App page](https://appshunter.io/ios/app/prompt-stock/id6775540584)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is leaDCalc free?

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

### Is Prompt Stock free?

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

### Do leaDCalc or Prompt Stock have ads?

Neither leaDCalc nor Prompt Stock shows ads.

### Which is updated more often, leaDCalc or Prompt Stock?

leaDCalc ships an update every 7 months, and Prompt Stock every 3 days. Most recently, leaDCalc was updated on November 3, 2026 and Prompt Stock 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.*