# Syncrogest vs Si

The clearest difference is update cadence: Syncrogest at every 3 weeks against Si's every 2 months. Si's advantage is iOS requirement (12.4 vs 15.0). 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.

Syncrogest ships an update every 3 weeks, Si every 2 months. The most recent releases landed on September 21, 2026 and June 2, 2026 respectively.

## The numbers

| Metric | Syncrogest | Si |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/si-manifold/id1294563130/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | — | Free |
| Size | 20 MB | 87 MB |
| Requires iOS | 15.0 | **12.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Syncrogest Srl](https://appshunter.io/developer/1742566580) | [SAUERMANN INDUSTRIE](https://appshunter.io/developer/1169513729) |

## What reviewers say

### Syncrogest

[App page](https://appshunter.io/ios/app/syncrogest/id462766279)

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

**In-app purchases:** none


### Si

[App page](https://appshunter.io/ios/app/si-manifold/id1294563130)

Instantly and accurately displays numerous measurements like pressure and temperature for specific devices. It supports long-range Bluetooth connectivity and can store and update approximately 120 refrigerants, including environmentally friendly options.

**Highlights:** Real-time measurement display, Bluetooth 4.2 connectivity (up to 30m), Storage for ~120 refrigerants, Environmentally friendly refrigerant support, Updateable refrigerant database

**In-app purchases:** none


## Frequently asked questions

### Is Syncrogest free?

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

### Is Si free?

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

### Do Syncrogest or Si have ads?

Neither Syncrogest nor Si shows ads.

### Which is updated more often, Syncrogest or Si?

Syncrogest ships an update every 3 weeks, and Si every 2 months. Most recently, Syncrogest was updated on September 21, 2026 and Si on June 2, 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.*