# ONWASA vs Scheme O

The clearest difference is update cadence: Scheme O at every 9 days against ONWASA's every 5 months. 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, Scheme O every 9 days. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | ONWASA | Scheme O |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/scheme-o/id6763953291/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 9 days** |
| Monetization | — | Free |
| Size | 16 MB | 13 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Onslow Water and Sewer Authority](https://appshunter.io/developer/1607792207) | [Collin Bergstrom](https://appshunter.io/developer/1895571491) |

## What reviewers say

### ONWASA

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

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

**In-app purchases:** none


### Scheme O

[App page](https://appshunter.io/ios/app/scheme-o/id6763953291)

This tactical planning tool enables leaders to quickly create mission graphics and planning products. It allows for rapid geometry creation, flexible map drawing, and route planning with checkpoints, streamlining the mission planning process.

**Highlights:** Rapid geometry creation, Flexible map drawing, Route planning with checkpoints, Integrated planning tools, Close air support planning, Weather integration, Data matrix output, 3D recon

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

**In-app purchases:** none


## Frequently asked questions

### Is ONWASA free?

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

### Is Scheme O free?

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

### Do ONWASA or Scheme O have ads?

Neither ONWASA nor Scheme O shows ads.

### Which is updated more often, ONWASA or Scheme O?

ONWASA ships an update every 5 months, and Scheme O every 9 days. Most recently, ONWASA was updated on October 2, 2026 and Scheme O on October 7, 2026.

---

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