# Sunderland Libraries vs Harmoni Heating

The clearest difference is review sentiment: Harmoni Heating at 27% against Sunderland Libraries's 0%. 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.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on August 10, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Sunderland Libraries | Harmoni Heating |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | **26.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 50 MB | 80 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Sunderland City Council](https://appshunter.io/developer/1472392795) | [Home Domotic Developments, S.L.](https://appshunter.io/developer/1481462876) |

## What reviewers say

### Sunderland Libraries

[App page](https://appshunter.io/ios/app/sunderland-libraries/id976185291)

Manage your library account on the go. Search the catalog, renew borrowed items, and place holds on new books directly from your device.

**Highlights:** Manage library account, Search library catalog, Renew borrowed books, Reserve books, Access from iPhone, iPad, iPod Touch

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

**In-app purchases:** none


### Harmoni Heating

[App page](https://appshunter.io/ios/app/harmoni-heating/id1481462803)

Easily manage your smart radiators from anywhere. Group devices by zone, adjust temperatures remotely, and personalize heating schedules for energy savings. Monitor consumption and costs with detailed statistics.

**Highlights:** Remote temperature adjustment, Zone grouping for radiators, Customizable heating schedules, Energy consumption monitoring, Preset heating programs, Screen color customization

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sunderland Libraries free?

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

### Is Harmoni Heating free?

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

### Do Sunderland Libraries or Harmoni Heating have ads?

Neither Sunderland Libraries nor Harmoni Heating shows ads.

### Which is updated more often, Sunderland Libraries or Harmoni Heating?

Sunderland Libraries ships an update every 2 months, and Harmoni Heating every 2 months. Most recently, Sunderland Libraries was updated on August 10, 2026 and Harmoni Heating on September 24, 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.*