# Optimal° vs Flash Studio

The clearest difference is rating: Flash Studio at 4.8 against Optimal°'s 3.9. Flash Studio also leads on update cadence (fortnightly vs every 5 months) and ratings volume (5.7K vs 9). Optimal°'s advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, review sentiment, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Flash Studio holds the better App Store score, 4.8 against 3.9. That said, the two scores are not equally well evidenced: Flash Studio has 5.7K ratings behind it against 9, so its average is the more settled of the two. Written reviews complicate that: 60% of Optimal°'s written reviews are positive against 58% of Flash Studio's, so the app with the better star average is not the one people write more warmly about.

Optimal° ships an update every 5 months, Flash Studio fortnightly. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Optimal° | Flash Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (9 ratings)](https://appshunter.io/ios/app/optimal/id6473653236/reviews) | **[4.8 (5.7K ratings)](https://appshunter.io/ios/app/flash-studio/id6756779254/reviews)** |
| Number of ratings | 9 | **5.7K** |
| Positive reviews | **60.0% of reviews** | 58.4% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | **Free** | Ad-supported |
| Size | 19 MB | 100 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Its Optimal LLC](https://appshunter.io/developer/1719356914) | [浙江闪铸三维科技有限公司](https://appshunter.io/developer/999198567) |

## What reviewers say

### Optimal°

[App page](https://appshunter.io/ios/app/optimal/id6473653236)

This app provides remote control and monitoring for a specific brand of tankless water heaters. Users can adjust temperature, track performance metrics, and receive diagnostic information for efficient hot water management.

**Highlights:** Set water heater output temperature, Monitor unit activity state, Track flow rate and energy consumption, View inlet and outlet water temperatures, Access diagnostics and error codes, Enable Vacation Mode

**In-app purchases:** none


### Flash Studio

[App page](https://appshunter.io/ios/app/flash-studio/id6756779254)

Manage your 3D printers remotely from your smartphone. Monitor print status, view live video feeds of your printer's operations, and control multiple printers simultaneously.

**Highlights:** Remote printer monitoring, Real-time video feed, Manage grouped printers, On-the-go management, Smartphone integration

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

**In-app purchases:** none


## Frequently asked questions

### Is Optimal° free?

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

### Is Flash Studio free?

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

### Which has better reviews, Optimal° or Flash Studio?

Flash Studio is rated higher. Optimal° averages 3.9 out of 5 from 9 ratings, while Flash Studio averages 4.8 from 5.7K ratings.

### Do Optimal° or Flash Studio have ads?

Flash Studio shows ads; Optimal° does not.

### Which is updated more often, Optimal° or Flash Studio?

Optimal° ships an update every 5 months, and Flash Studio fortnightly. Most recently, Optimal° was updated on October 24, 2026 and Flash Studio on October 30, 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.*