# ECI Bolt vs Sierra Data Systems

The clearest difference is rating: Sierra Data Systems at 4.0 against ECI Bolt's 2.7. ECI Bolt's advantage is ratings volume (76 vs 2) and review sentiment (18% vs 0%). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sierra Data Systems holds the better App Store score, 4.0 against 2.7. That said, the two scores are not equally well evidenced: ECI Bolt has 76 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 18% of ECI Bolt's written reviews are positive against 0% of Sierra Data Systems's, so the app with the better star average is not the one people write more warmly about.

ECI Bolt ships an update fortnightly, Sierra Data Systems every 3 weeks. The most recent releases landed on September 19, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | ECI Bolt | Sierra Data Systems |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (76 ratings)](https://appshunter.io/ios/app/eci-bolt/id583753013/reviews) | **[4.0 (2 ratings)](https://appshunter.io/ios/app/sierra-data-systems/id989442571/reviews)** |
| Number of ratings | **76** | 2 |
| Positive reviews | **18.2% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 106 MB | 51 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bolt Software Technology, LLC](https://appshunter.io/developer/583753016) | [DATArrive](https://appshunter.io/developer/388347947) |

## What reviewers say

### ECI Bolt

[App page](https://appshunter.io/ios/app/eci-bolt/id583753013)

This app streamlines operations for trade subcontractors in the homebuilding industry. It offers robust tools for scheduling, project management, and estimating, enhancing efficiency in the field. Key features include mobile access, reporting, and integration with popular accounting software.

**Highlights:** Mobile Access, Scheduling, Project Management, Estimating, Reporting Tools, Document Management, QuickBooks Integration

**In-app purchases:** none


### Sierra Data Systems

[App page](https://appshunter.io/ios/app/sierra-data-systems/id989442571)

Streamline last-mile logistics and manufacturing operations. Track valuable company assets efficiently to improve profitability and customer satisfaction. Optimize your supply chain from production to delivery.

**Highlights:** Last-mile logistics optimization, Manufacturing process efficiency, Real-time asset tracking, Improved customer satisfaction, Reduced delivery costs, Enhanced production visibility

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

**In-app purchases:** none


## Frequently asked questions

### Is ECI Bolt free?

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

### Is Sierra Data Systems free?

Sierra Data Systems is free to download, with no in-app purchases.

### Which has better reviews, ECI Bolt or Sierra Data Systems?

Sierra Data Systems is rated higher. ECI Bolt averages 2.7 out of 5 from 76 ratings, while Sierra Data Systems averages 4.0 from 2 ratings.

### Do ECI Bolt or Sierra Data Systems have ads?

Neither ECI Bolt nor Sierra Data Systems shows ads.

### Which is updated more often, ECI Bolt or Sierra Data Systems?

ECI Bolt ships an update fortnightly, and Sierra Data Systems every 3 weeks. Most recently, ECI Bolt was updated on September 19, 2026 and Sierra Data Systems on September 16, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*