# Onis POS vs eWater.mn

The clearest difference is iOS requirement: Onis POS at 13.0 against eWater.mn's 15.1. 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.

Onis POS ships an update monthly, eWater.mn fortnightly. The most recent releases landed on August 13, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Onis POS | eWater.mn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/onis-pos/id1232097366/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free | — |
| Size | 20 MB | 28 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Datacare LLC](https://appshunter.io/developer/1220811353) | [Astvision LLC](https://appshunter.io/developer/859727778) |

## What reviewers say

### Onis POS

[App page](https://appshunter.io/ios/app/onis-pos/id1232097366)

This application simplifies sales operations for shops, markets, and service providers. It allows users to issue official tax receipts to customers and track sales data. Connect to any Bluetooth printer for easy receipt printing.

**Highlights:** Issue QR code receipts, Track sales data, Connect to Bluetooth printers, Email receipts to customers, Multiple payment options, Monitor sales to tax authorities, Works on smartphones and tablets

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

**In-app purchases:** none


### eWater.mn

[App page](https://appshunter.io/ios/app/ewatermn/id6738036291)

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

**In-app purchases:** none


## Frequently asked questions

### Is Onis POS free?

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

### Is eWater.mn free?

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

### Do Onis POS or eWater.mn have ads?

Neither Onis POS nor eWater.mn shows ads.

### Which is updated more often, Onis POS or eWater.mn?

Onis POS ships an update monthly, and eWater.mn fortnightly. Most recently, Onis POS was updated on August 13, 2026 and eWater.mn on September 9, 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.*