# CAASIM vs appTopan

The clearest difference is update cadence: appTopan at every 2 weeks against CAASIM's every 2 months. CAASIM's advantage is iOS requirement (12.0 vs 14.0.0). 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.

CAASIM ships an update every 2 months, appTopan every 2 weeks. The most recent releases landed on September 23, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | CAASIM | appTopan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (4 ratings)](https://appshunter.io/ios/app/caasim/id1500820580/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 20 MB | 55 MB |
| Requires iOS | **12.0** | 14.0.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gobierno del Estado de Hidalgo](https://appshunter.io/developer/896802652) | [Erik Tovar](https://appshunter.io/developer/1718334043) |

## What reviewers say

### CAASIM

[App page](https://appshunter.io/ios/app/caasim/id1500820580)

Manage your water and sewage accounts, view bills, make payments, and find branch locations. Access services online and stay updated on your consumption history from home.

**Highlights:** Manage multiple accounts, View account statements, Online payments, Download bills and receipts, Locate branches, View consumption history, Emergency numbers

**Features:** macOS Compatibility

**In-app purchases:** none


### appTopan

[App page](https://appshunter.io/ios/app/apptopan/id6747365272)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CAASIM free?

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

### Is appTopan free?

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

### Do CAASIM or appTopan have ads?

Neither CAASIM nor appTopan shows ads.

### Which is updated more often, CAASIM or appTopan?

CAASIM ships an update every 2 months, and appTopan every 2 weeks. Most recently, CAASIM was updated on September 23, 2026 and appTopan on September 30, 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.*