# Della+ vs Optimal°

The clearest difference is review sentiment: Optimal° at 60% against Della+'s 9%. Optimal° also leads on rating (4.9 vs 3.6). Della+'s advantage is ratings volume (423 vs 7) and device support (4 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Optimal° holds the better App Store score, 4.9 against 3.6. That said, the two scores are not equally well evidenced: Della+ has 423 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 9% of Della+'s written reviews are positive against 60% of Optimal°'s.

Della+ ships an update every 3 months, Optimal° every 5 months. The most recent releases landed on October 11, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Della+ | Optimal° |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (423 ratings)](https://appshunter.io/ios/app/della-plus/id1590950655/reviews) | **[4.9 (7 ratings)](https://appshunter.io/ios/app/optimal/id6473653236/reviews)** |
| Number of ratings | **423** | 7 |
| Positive reviews | 8.8% of reviews | **60.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | Free | Free |
| Size | 241 MB | 19 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Align Inc. (CA)](https://appshunter.io/developer/1590950657) | [Its Optimal LLC](https://appshunter.io/developer/1719356914) |

## What reviewers say

### Della+

[App page](https://appshunter.io/ios/app/della-plus/id1590950655)

Control smart home appliances remotely for optimal comfort and energy efficiency. Adjust settings, automate temperature based on location, and integrate with voice assistants for a seamless living experience.

**Highlights:** Remote appliance control, Smart feature integration, Energy efficiency, Voice assistant compatibility (Alexa, Google Assistant), WiFi connectivity, GeoFence temperature adjustment

**Features:** Apple Watch app

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 👍 Integrated seamlessly with product
- 💡 Connects to other products

**What reviewers complain about**

- 🐛 App doesn't work properly
- 🐛 Can't increase temperature
- 🐛 Connectivity issues
- 🐛 Removed features after update
- 🐛 Confusing interface

**Reported bugs**

- App freezes or becomes unresponsive
- Fails to connect to devices
- Loses saved settings and configurations
- Displays incorrect or inconsistent information

**Requested features**

- Add ability to increase temperature
- Restore removed features
- Improve app stability and reliability
- Enhance user interface and controls
- Add support for more device models


### 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


## Frequently asked questions

### Is Della+ free?

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

### Is Optimal° free?

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

### Which has better reviews, Della+ or Optimal°?

Optimal° is rated higher. Della+ averages 3.6 out of 5 from 423 ratings, while Optimal° averages 4.9 from 7 ratings.

### Do Della+ or Optimal° have ads?

Neither Della+ nor Optimal° shows ads.

### Which is updated more often, Della+ or Optimal°?

Della+ ships an update every 3 months, and Optimal° every 5 months. Most recently, Della+ was updated on October 11, 2026 and Optimal° on September 29, 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.*