# e vs SparkShift

The clearest difference is rating: SparkShift at 5.0 against e's 3.0. SparkShift also leads on update cadence (every 9 days vs every 5 months) and ratings volume (3 vs 1). e's advantage is in-app purchases (none vs 4) and iOS requirement (6.1 vs 16.2). On price, ads and device support there is nothing between them.

Both are free to download. SparkShift sells 4 in-app purchases, starting at $0.99 per month. e asks for nothing beyond the download.

SparkShift holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

e ships an update every 5 months, SparkShift every 9 days. The most recent releases landed on October 5, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | e | SparkShift |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/e-calcfree/id591591892/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sparkshift/id6737710285/reviews)** |
| Number of ratings | 1 | **3** |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 9 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 199 MB |
| Requires iOS | **6.1** | 16.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [e-skett Corp.](https://appshunter.io/developer/591591895) | [SPARKSHIFT LLC](https://appshunter.io/developer/1777536968) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-calcfree/id591591892)

This scientific calculator supports engineering notation with prefixes like pico, nano, and mega. It offers a history feature to review past calculations and allows editing of formulas for recalculation. The free version has some limitations on history scrolling and saving.

**Highlights:** Scientific notation support, Engineering multipliers (p, n, u, m, k, M), History of past calculations, Editable formulas for recalculation, Unit conversion for engineering prefixes

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

**In-app purchases:** none


### SparkShift

[App page](https://appshunter.io/ios/app/sparkshift/id6737710285)

This app helps electricians streamline OJT logging, jobsite organization, and exam preparation. It provides field calculators and reference tools, consolidating essential resources for apprentices and journeymen in one place.

**Highlights:** Log OJT and work hours, Field calculators for electrical work, Journeyman and master exam practice, Organize jobsite details and notes, Track apprenticeship progress, Export hour records

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Journeyman Month | $0.99 | per month |
| Apprentice Month Subscription | $6.99 | per month |
| Journeyman Year Subscription | $29.00 | per year |
| Apprentice Yearly Sub | $69.99 | per year |


## Frequently asked questions

### Is e free?

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

### Is SparkShift free?

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

### Which has better reviews, e or SparkShift?

SparkShift is rated higher. e averages 3.0 out of 5 from 1 ratings, while SparkShift averages 5.0 from 3 ratings.

### Do e or SparkShift have ads?

Neither e nor SparkShift shows ads.

### Which is updated more often, e or SparkShift?

e ships an update every 5 months, and SparkShift every 9 days. Most recently, e was updated on October 5, 2026 and SparkShift on October 13, 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.*