# herz TS vs JP i

The clearest difference is update cadence: JP i at every 5 weeks against herz TS's every 4 months. herz TS's advantage is iOS requirement (9.0 vs 13.0). On price, ads, 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.

herz TS ships an update every 4 months, JP i every 5 weeks. The most recent releases landed on October 23, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | herz TS | JP i |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/herz-ts/id598691471/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 4 MB | 19 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aleksandar Jovanovic](https://appshunter.io/developer/598691474) | [JUDO Wasseraufbereitung GmbH](https://appshunter.io/developer/412864390) |

## What reviewers say

### herz TS

[App page](https://appshunter.io/ios/app/herz-ts/id598691471)

This tool assists with heating system calculations and radiator valve selection. It offers a preset calculator and a dedicated radiator valve selection tool, sharing a common database and calculation engine.

**Highlights:** Preset calculator, Radiator valve selection tool, Shared calculation engine, Shared database

**Features:** macOS Compatibility

**In-app purchases:** none


### JP i

[App page](https://appshunter.io/ios/app/jp-i-kom/id6745804213)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is herz TS free?

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

### Is JP i free?

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

### Do herz TS or JP i have ads?

Neither herz TS nor JP i shows ads.

### Which is updated more often, herz TS or JP i?

herz TS ships an update every 4 months, and JP i every 5 weeks. Most recently, herz TS was updated on October 23, 2026 and JP i on October 20, 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.*