# OptiTools Mobile vs SLD | Electrical diagrams

The clearest difference is review sentiment: OptiTools Mobile at 100% against SLD | Electrical diagrams's 45%. OptiTools Mobile also leads on price (Free vs $1.99) and in-app purchases (none vs 1). SLD | Electrical diagrams's advantage is rating (4.1 vs 3.5) and update cadence (fortnightly vs every 4 months). On ads and device support there is nothing between them.

OptiTools Mobile is free to download; SLD | Electrical diagrams costs $1.99 up front. SLD | Electrical diagrams sells 1 one-off in-app purchase. OptiTools Mobile asks for nothing beyond the download.

SLD | Electrical diagrams holds the better App Store score, 4.1 against 3.5. That said, the two scores are not equally well evidenced: SLD | Electrical diagrams has 133 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 100% of OptiTools Mobile's written reviews are positive against 45% of SLD | Electrical diagrams's, so the app with the better star average is not the one people write more warmly about.

OptiTools Mobile ships an update every 4 months, SLD | Electrical diagrams fortnightly. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | OptiTools Mobile | SLD | Electrical diagrams |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [3.5 (2 ratings)](https://appshunter.io/ios/app/optitools-mobile/id1279710384/reviews) | **[4.1 (133 ratings)](https://appshunter.io/ios/app/sld-electrical-diagrams/id1534899128/reviews)** |
| Number of ratings | 2 | **133** |
| Positive reviews | **100.0% of reviews** | 45.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 139 MB | 13 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Invertek Drives Limited](https://appshunter.io/developer/1279710383) | [Angel Martinez](https://appshunter.io/developer/1446956865) |

## What reviewers say

### OptiTools Mobile

[App page](https://appshunter.io/ios/app/optitools-mobile/id1279710384)

Configure and monitor Optidrive products wirelessly via Bluetooth. Transfer parameter sets, view real-time drive status, motor speed, current, and power. Adjust motor speed, start/stop drives, and reset trips when unlocked.

**Highlights:** Wireless configuration via Bluetooth BLE, Real-time parameter monitoring and editing, Transfer parameter sets between drive and smartphone, Monitor drive status, motor speed, current, and power, Adjust motor speed, start/stop drives, reset trips

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

**In-app purchases:** none


### SLD | Electrical diagrams

[App page](https://appshunter.io/ios/app/sld-electrical-diagrams/id1534899128)

Easily create single-line electrical diagrams with a vast library of IEC and ANSI standard symbols. Drag and drop components to build your schemes, with options to save and edit in the PRO version.

**Highlights:** Create single-line diagrams, Drag and drop symbol placement, IEC and ANSI standard symbols, Save and edit schemes (PRO), Export as image, PDF, or file, Add text labels (volt, watt, etc.)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads, save diagram | $3.99 | one-time |

**What reviewers like**

- 👍 User-friendly
- 🚀 Simple and fast
- 💡 Excellent for small projects
- 👍 Easy to use
- 👍 Intuitive interface

**What reviewers complain about**

- 🐛 Crashes and stability issues
- 🐛 Saving and loading problems
- 🐛 Unreliable Pro version
- 🐛 Disappearing saved projects
- 🔍 Limited symbol library

**Reported bugs**

- Saved projects disappear or cannot be opened
- Pro version not working as expected
- Frequent crashes and app instability
- Saving and loading issues

**Requested features**

- Add more electrical symbols and components
- Improve text editing and positioning
- Implement undo/redo functionality
- Allow changing wire/conductor colors
- Add support for exporting to DWG or DXF formats


## Frequently asked questions

### Is OptiTools Mobile free?

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

### Is SLD | Electrical diagrams free?

SLD | Electrical diagrams costs $1.99, and also offers in-app purchases.

### Which has better reviews, OptiTools Mobile or SLD | Electrical diagrams?

SLD | Electrical diagrams is rated higher. OptiTools Mobile averages 3.5 out of 5 from 2 ratings, while SLD | Electrical diagrams averages 4.1 from 133 ratings.

### Do OptiTools Mobile or SLD | Electrical diagrams have ads?

Neither OptiTools Mobile nor SLD | Electrical diagrams shows ads.

### Which is updated more often, OptiTools Mobile or SLD | Electrical diagrams?

OptiTools Mobile ships an update every 4 months, and SLD | Electrical diagrams fortnightly. Most recently, OptiTools Mobile was updated on November 6, 2026 and SLD | Electrical diagrams on November 7, 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.*