# Proviso vs Sensor Chemstore

The clearest difference is iOS requirement: Proviso at 15.6 against Sensor Chemstore's 17.2. 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.

Both ship on a similar rhythm, roughly every 6 months. The most recent releases landed on September 5, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | Proviso | Sensor Chemstore |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | Every 6 months |
| Size | 25 MB | 51 MB |
| Requires iOS | **15.6** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Proviso AS](https://appshunter.io/developer/1324305481) | [Sensor Chemcontrol AS](https://appshunter.io/developer/1498593538) |

## What reviewers say

### Proviso

[App page](https://appshunter.io/ios/app/proviso/id1324305482)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sensor Chemstore

[App page](https://appshunter.io/ios/app/sensor-chemstore/id1498593539)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Proviso free?

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

### Is Sensor Chemstore free?

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

### Do Proviso or Sensor Chemstore have ads?

Neither Proviso nor Sensor Chemstore shows ads.

### Which is updated more often, Proviso or Sensor Chemstore?

Proviso ships an update every 6 months, and Sensor Chemstore every 6 months. Most recently, Proviso was updated on September 5, 2026 and Sensor Chemstore on May 16, 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.*