# Chemical Solution Simple vs Rockwall ISD

The clearest difference is price: Rockwall ISD at Free against Chemical Solution Simple's $2.99. Rockwall ISD also leads on ratings volume (10 vs 1) and iOS requirement (14.0 vs 17.0). Chemical Solution Simple's advantage is rating (5.0 vs 3.8) and review sentiment (100% vs 67%). On ads, in-app purchases and device support there is nothing between them.

Rockwall ISD is free to download; Chemical Solution Simple costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Chemical Solution Simple holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Rockwall ISD has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Chemical Solution Simple's written reviews are positive against 67% of Rockwall ISD's.

Chemical Solution Simple ships an update every 3 months, Rockwall ISD every 14 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | Chemical Solution Simple | Rockwall ISD |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chemical-solution-simple/id1080912267/reviews)** | [3.8 (10 ratings)](https://appshunter.io/ios/app/rockwall-isd/id1194687344/reviews) |
| Number of ratings | 1 | **10** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 14 months |
| Monetization | Paid | **Free** |
| Size | 1 MB | 37 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Roman Volinsky](https://appshunter.io/developer/977951850) | [ROCKWALL INDEPENDENT SCHOOL DISTRICT PUBLIC FACILITY CORPORATION](https://appshunter.io/developer/1435183618) |

## What reviewers say

### Chemical Solution Simple

[App page](https://appshunter.io/ios/app/chemical-solution-simple/id1080912267)

This app assists in preparing chemical solutions through dissolution and dilution. It calculates moles, molar masses, required solute weights, and starting solution volumes, supporting various concentration units.

**Highlights:** Solution preparation by dissolution, Solution preparation by dilution, Mole calculation, Molar mass analysis, Required solute weight calculation, Starting solution volume calculation, Supports Molar, mM, uM, g/l, mg/l units

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

**In-app purchases:** none


### Rockwall ISD

[App page](https://appshunter.io/ios/app/rockwall-isd/id1194687344)

Stay informed about your school district with personalized news and updates. Access important information, receive notifications, and connect with school resources. This app offers a direct line to district happenings for students, parents, and the community.

**Highlights:** Personalized news feed, District and school news, District tip line access, Customizable notifications, District directory, Contact information management

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chemical Solution Simple free?

Chemical Solution Simple costs $2.99, with no in-app purchases.

### Is Rockwall ISD free?

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

### Which has better reviews, Chemical Solution Simple or Rockwall ISD?

Chemical Solution Simple is rated higher. Chemical Solution Simple averages 5.0 out of 5 from 1 ratings, while Rockwall ISD averages 3.8 from 10 ratings.

### Do Chemical Solution Simple or Rockwall ISD have ads?

Neither Chemical Solution Simple nor Rockwall ISD shows ads.

### Which is updated more often, Chemical Solution Simple or Rockwall ISD?

Chemical Solution Simple ships an update every 3 months, and Rockwall ISD every 14 months. Most recently, Chemical Solution Simple was updated on November 2, 2026 and Rockwall ISD on November 2, 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.*