# FlexSpec Backpack vs Dirt Locker Erosion Control

The clearest difference is update cadence: Dirt Locker Erosion Control at monthly against FlexSpec Backpack's every 24 months. FlexSpec Backpack's advantage is iOS requirement (9.3 vs 13.0). 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.

FlexSpec Backpack ships an update every 24 months, Dirt Locker Erosion Control monthly. The most recent releases landed on September 10, 2026 and July 27, 2026 respectively.

## The numbers

| Metric | FlexSpec Backpack | Dirt Locker Erosion Control |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/dirt-locker-erosion-control/id6740719075/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Monthly** |
| Monetization | — | Free |
| Size | 140 MB | 37 MB |
| Requires iOS | **9.3** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Bubble Technology Industries](https://appshunter.io/developer/1235174582) | [Christopher Trebilcock](https://appshunter.io/developer/1791249217) |

## What reviewers say

### FlexSpec Backpack

[App page](https://appshunter.io/ios/app/flexspec-backpack/id1235174583)

**Features:** macOS Compatibility

**In-app purchases:** none


### Dirt Locker Erosion Control

[App page](https://appshunter.io/ios/app/dirt-locker-erosion-control/id6740719075)

This app simplifies hillside projects by allowing users to measure slopes, calculate material needs, and purchase products directly. It's designed for both backyard transformations and larger landscaping endeavors, ensuring accurate planning and product selection for terracing and gardening.

**Highlights:** Easy slope measurement, Smart material calculator, In-app product purchasing, Project tracking and organization, Shareable PDF reports, Offline mode

**In-app purchases:** none


## Frequently asked questions

### Is FlexSpec Backpack free?

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

### Is Dirt Locker Erosion Control free?

Dirt Locker Erosion Control is free to download, with no in-app purchases.

### Do FlexSpec Backpack or Dirt Locker Erosion Control have ads?

Neither FlexSpec Backpack nor Dirt Locker Erosion Control shows ads.

### Which is updated more often, FlexSpec Backpack or Dirt Locker Erosion Control?

FlexSpec Backpack ships an update every 24 months, and Dirt Locker Erosion Control monthly. Most recently, FlexSpec Backpack was updated on September 10, 2026 and Dirt Locker Erosion Control on July 27, 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.*