# iSolveModel vs Archie

The clearest difference is price: Archie at Free against iSolveModel's $9.99. Archie also leads on update cadence (every 6 days vs every 4 months) and review sentiment (100% vs 71%). iSolveModel's advantage is rating (5.0 vs 4.8). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Archie is free to download; iSolveModel costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iSolveModel holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Archie has 14 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 71% of iSolveModel's written reviews are positive against 100% of Archie's, so the app with the better star average is not the one people write more warmly about.

iSolveModel ships an update every 4 months, Archie every 6 days. The most recent releases landed on September 12, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | iSolveModel | Archie |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/isolvemodel/id387627473/reviews)** | [4.8 (14 ratings)](https://appshunter.io/ios/app/archie-architecture-id/id6503988435/reviews) |
| Number of ratings | 2 | **14** |
| Positive reviews | 71.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 days** |
| Monetization | Paid | **Free** |
| Size | 5 MB | 56 MB |
| Requires iOS | 17.1 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [MINDTech](https://appshunter.io/developer/382887010) | [Jason Girouard](https://appshunter.io/developer/1750592219) |

## What reviewers say

### iSolveModel

[App page](https://appshunter.io/ios/app/isolvemodel/id387627473)

This app offers a powerful linear programming solver for iOS devices, utilizing the simplex algorithm and an integrated MIP solver for integer variables. It's designed for students and professionals in operations research and related fields, allowing easy model creation and sharing.

**Highlights:** Linear programming solver, Simplex algorithm, Integrated MIP solver, Sensitivity analysis, iTunes File Sharing, Email model/solution transfer, Text-based model documents

**Features:** macOS Compatibility

**In-app purchases:** none


### Archie

[App page](https://appshunter.io/ios/app/archie-architecture-id/id6503988435)

Identify architectural styles and building features. Learn about specific structures, their architects, and the neighborhood's influence on design. An AI architect acts as your virtual guide and expert.

**Highlights:** Identify architectural styles, Learn about building features, Discover architects and their designs, Explore neighborhood architectural influence, AI virtual tour guide

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iSolveModel free?

iSolveModel costs $9.99, with no in-app purchases.

### Is Archie free?

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

### Which has better reviews, iSolveModel or Archie?

iSolveModel is rated higher. iSolveModel averages 5.0 out of 5 from 2 ratings, while Archie averages 4.8 from 14 ratings.

### Do iSolveModel or Archie have ads?

Neither iSolveModel nor Archie shows ads.

### Which is updated more often, iSolveModel or Archie?

iSolveModel ships an update every 4 months, and Archie every 6 days. Most recently, iSolveModel was updated on September 12, 2026 and Archie on September 17, 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.*