# ONWASA vs ESTIMATE

The clearest difference is update cadence: ESTIMATE at every 2 weeks against ONWASA's every 5 months. ESTIMATE also leads on iOS requirement (12.0 vs 16.0). 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.

ONWASA ships an update every 5 months, ESTIMATE every 2 weeks. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | ONWASA | ESTIMATE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/estimate-hc/id6502640114/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 16 MB | 101 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Onslow Water and Sewer Authority](https://appshunter.io/developer/1607792207) | [Naval Air Systems Command](https://appshunter.io/developer/1023730302) |

## What reviewers say

### ONWASA

[App page](https://appshunter.io/ios/app/onwasa/id1607792205)

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

**In-app purchases:** none


### ESTIMATE

[App page](https://appshunter.io/ios/app/estimate-hc/id6502640114)

This engineering tool provides quick calculations for horizontal construction projects. It estimates vehicle and logistic metrics and features an AR 3D model viewer to visualize site layouts in real-world environments.

**Highlights:** Horizontal construction estimation, Vehicle and logistic metrics calculation, Augmented reality 3D model viewer, AR model placement and viewing, Site layout visualization

**In-app purchases:** none


## Frequently asked questions

### Is ONWASA free?

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

### Is ESTIMATE free?

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

### Do ONWASA or ESTIMATE have ads?

Neither ONWASA nor ESTIMATE shows ads.

### Which is updated more often, ONWASA or ESTIMATE?

ONWASA ships an update every 5 months, and ESTIMATE every 2 weeks. Most recently, ONWASA was updated on October 2, 2026 and ESTIMATE on October 9, 2026.

---

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