# Joist vs Electrical Amps

The clearest difference is review sentiment: Joist at 61% against Electrical Amps's 0%. Joist also leads on rating (4.7 vs 3.0) and ads (none vs shown). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Joist sells 10 in-app purchases, starting at $9.99 per month and Electrical Amps sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Joist holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Joist has 15K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 61% of Joist's written reviews are positive against 0% of Electrical Amps's.

Joist ships an update every 2 weeks, Electrical Amps every 7 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Joist | Electrical Amps |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (15K ratings)](https://appshunter.io/ios/app/joist-estimate-invoice-maker/id592163563/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/electrical-amps/id1522971343/reviews) |
| Number of ratings | **15K** | 2 |
| Positive reviews | **61.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 7 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#15** | — |
| Size | 194 MB | 10 MB |
| Requires iOS | **16.0** | 17.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Joist Software Inc.](https://appshunter.io/developer/512868153) | [Zsolt Giczi](https://appshunter.io/developer/1207577154) |

## What reviewers say

### Joist

[App page](https://appshunter.io/ios/app/joist-estimate-invoice-maker/id592163563)

**Currently charting:** #15 Top Grossing · Business (US App Store)

Streamline your contracting business with tools for creating professional estimates and invoices, managing jobs, and accepting secure payments. Keep all client and job details organized in one place, accessible from any device.

**Highlights:** Create professional estimates and invoices, Manage jobs and client information, Schedule work and track workload, Accept credit card and PayPal payments, Customize with company logo, Convert estimates to invoices, Export data to accounting programs

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quickbooks Sync Monthly | $9.99 | per month |
| Joist Basics Monthly | $9.99 | per month |
| Joist Pro Monthly | $16.99 | per month |
| Joist Elite Monthly | $31.99 | per month |
| Quickbooks Sync Annual | $90.99 | per year |
| Joist Run Monthly | $99.99 | per month |
| Joist Basics Annual | $99.99 | per year |
| Joist Pro Annual | $169.99 | per year |
| Joist Elite Annual | $319.99 | per year |
| Joist Run Annual | $999.99 | per year |

**What reviewers like**

- 🚀 Easy to use
- 🚀 Professional-looking invoices
- 🚀 Convenient for small businesses
- 🚀 Helpful for organizing estimates and invoices
- 🚀 Great customer service

**What reviewers complain about**

- 🐛 Bugs and glitches
- 🔒 Security and payment processing issues
- 💰 Expensive subscription fees
- 🔒 Locking users out of their data
- 🤯 Removing previously free features

**Reported bugs**

- Freezing when removing photos
- Estimates and invoices not being delivered
- Inconsistent behavior across devices
- Issues with payment processing and funds being held

**Requested features**

- Offline mode
- Ability to customize invoices and estimates
- More payment options
- Integration with accounting software
- Better organization and search for past invoices


### Electrical Amps

[App page](https://appshunter.io/ios/app/electrical-amps/id1522971343)

This app assists electrical tradespeople with ampacity calculations, incorporating correction factors based on the latest National and Canadian Electrical Codes. It offers a free trial period before requiring a monthly or yearly subscription for full functionality.

**Highlights:** Ampacity calculations, Correction factors, 2026 USA National Electrical Code compliance, 2024 Canadian Electrical Code compliance, 7-day free trial, Monthly and yearly subscription options

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Month | $1.99 | per month |
| Year | $17.99 | per year |
| Lifetime no ads displayed | $3.99 | one-time |


## Frequently asked questions

### Is Joist free?

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

### Is Electrical Amps free?

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

### Which has better reviews, Joist or Electrical Amps?

Joist is rated higher. Joist averages 4.7 out of 5 from 15K ratings, while Electrical Amps averages 3.0 from 2 ratings.

### Do Joist or Electrical Amps have ads?

Electrical Amps shows ads; Joist does not.

### Which is updated more often, Joist or Electrical Amps?

Joist ships an update every 2 weeks, and Electrical Amps every 7 months. Most recently, Joist was updated on November 7, 2026 and Electrical Amps on November 3, 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.*