# SaaS Knowledge Test vs SOLID Architecture

The clearest difference is update cadence: SOLID Architecture at every 9 days against SaaS Knowledge Test's every 2 months. SOLID Architecture also leads on iOS requirement (13.0 vs 17.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SaaS Knowledge Test sells 2 in-app purchases, starting at $9.99 per month and SOLID Architecture sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

SaaS Knowledge Test ships an update every 2 months, SOLID Architecture every 9 days. The most recent releases landed on December 24, 2025 and September 16, 2026 respectively.

## The numbers

| Metric | SaaS Knowledge Test | SOLID Architecture |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Size | 9 MB | 94 MB |
| Requires iOS | 17.2 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Cargo Teleport Inc](https://appshunter.io/developer/1761832181) | [Airton Siqueira de Freitas](https://appshunter.io/developer/1809776051) |

## What reviewers say

### SaaS Knowledge Test

[App page](https://appshunter.io/ios/app/saas-knowledge-test/id6738764054)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly subscription | $9.99 | per month |
| Lifetime version | $24.99 | one-time |


### SOLID Architecture

[App page](https://appshunter.io/ios/app/solid-architecture/id6755614891)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CERTIFICATE OF COMPLETION | $2.99 | one-time |
| Premium access | $4.99 | one-time |
| FULL PASS ALL APPS | $17.99 | one-time |


## Frequently asked questions

### Is SaaS Knowledge Test free?

SaaS Knowledge Test is free to download, with in-app purchases available.

### Is SOLID Architecture free?

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

### Do SaaS Knowledge Test or SOLID Architecture have ads?

Neither SaaS Knowledge Test nor SOLID Architecture shows ads.

### Which is updated more often, SaaS Knowledge Test or SOLID Architecture?

SaaS Knowledge Test ships an update every 2 months, and SOLID Architecture every 9 days. Most recently, SaaS Knowledge Test was updated on December 24, 2025 and SOLID Architecture on September 16, 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.*