# Solution AI vs SustainsysAI

The clearest difference is in-app purchases: SustainsysAI at none against Solution AI's 3. SustainsysAI also leads on update cadence (every 8 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Solution AI sells 3 in-app purchases, starting at $4.99 per 7 days. SustainsysAI asks for nothing beyond the download.

Solution AI ships an update monthly, SustainsysAI every 8 days. The most recent releases landed on September 25, 2026 and May 30, 2026 respectively.

## The numbers

| Metric | Solution AI | SustainsysAI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 8 days** |
| Size | 35 MB | 31 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Emir Simsek](https://appshunter.io/developer/1820897950) | [Satyawan Singh](https://appshunter.io/developer/1882830658) |

## What reviewers say

### Solution AI

[App page](https://appshunter.io/ios/app/solution-ai-problem-solver/id6747352034)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $4.99 | per 7 days |
| Pro Monthly | $14.99 | per month |
| Pro Yearly | $199.99 | per year |


### SustainsysAI

[App page](https://appshunter.io/ios/app/sustainsysai/id6760136910)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Solution AI free?

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

### Is SustainsysAI free?

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

### Do Solution AI or SustainsysAI have ads?

Neither Solution AI nor SustainsysAI shows ads.

### Which is updated more often, Solution AI or SustainsysAI?

Solution AI ships an update monthly, and SustainsysAI every 8 days. Most recently, Solution AI was updated on September 25, 2026 and SustainsysAI on May 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*