# iDrawlix Mobile vs Catalopedia

iDrawlix Mobile and Catalopedia both sit at 1.0 stars, but that hides the real split: 100% of iDrawlix Mobile's written reviews are positive against 0% of Catalopedia's. Catalopedia's advantage is update cadence (every 3 weeks vs every 10 months) and iOS requirement (13.0 vs 17.2). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. iDrawlix Mobile sells 2 one-off in-app purchases and Catalopedia sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 1.0 for iDrawlix Mobile against 1.0 for Catalopedia. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews are what separate them: 100% of iDrawlix Mobile's written reviews are positive against 0% of Catalopedia's.

iDrawlix Mobile ships an update every 10 months, Catalopedia every 3 weeks. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | iDrawlix Mobile | Catalopedia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/idrawlix-mobile/id1439486128/reviews) | [1.0 (2 ratings)](https://appshunter.io/ios/app/catalopedia/id1662071607/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 61 MB |
| Requires iOS | 17.2 | **13.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Studio Envisys](https://appshunter.io/developer/1279076741) | [Skrya Pte Ltd](https://appshunter.io/developer/1607060618) |

## What reviewers say

### iDrawlix Mobile

[App page](https://appshunter.io/ios/app/idrawlix-mobile/id1439486128)

This app allows users to design and verify partially full conduits and open channels. It offers various cross-section types and hydraulic calculation models, displaying real-time flow depth and discharge. Users can also generate stage-discharge curves and analyze hydraulic grade lines.

**Highlights:** Playground concept for real-time experimentation, Seven cross-section types, Four hydraulic calculation models, International and Imperial unit systems, Real-time normal flow depth and discharge display, Stage-Discharge curve generation, Hydraulic Grade Line (HGL) representation

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Watermarks unlock forever. | $2.99 | one-time |
| Full unlock forever. | $5.99 | one-time |


### Catalopedia

[App page](https://appshunter.io/ios/app/catalopedia/id1662071607)

This app serves as a comprehensive encyclopedia for catalytic converters, offering free, unlimited searches. It provides transparent pricing, accurate metal and FX updates, and detailed 3D rendered images with exact measurements. The app also features an AI-powered identification tool and welcomes collaboration for expanding its product catalog.

**Highlights:** Unlimited free catalytic converter searches, Transparent pricing with customizable rates, Hourly updated metal and FX prices, 3D rendered images with exact measurements, AI-powered converter identification (Beta), Country-specific product differentiation, Collaborative expansion of product catalog

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 30 Credits | $29.99 | one-time |
| 66 Credits | $59.99 | one-time |
| 144 Credits | $99.99 | one-time |
| 225 Credits | $179.99 | one-time |
| 360 Credits | $229.99 | one-time |


## Frequently asked questions

### Is iDrawlix Mobile free?

iDrawlix Mobile is free to download, with in-app purchases available.

### Is Catalopedia free?

Catalopedia is free to download, with in-app purchases available.

### Which has better reviews, iDrawlix Mobile or Catalopedia?

iDrawlix Mobile and Catalopedia are both rated 1.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do iDrawlix Mobile or Catalopedia have ads?

Neither iDrawlix Mobile nor Catalopedia shows ads.

### Which is updated more often, iDrawlix Mobile or Catalopedia?

iDrawlix Mobile ships an update every 10 months, and Catalopedia every 3 weeks. Most recently, iDrawlix Mobile was updated on October 14, 2026 and Catalopedia on October 15, 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.*