# Sensor Chemstore vs Khrono

The clearest difference is ads: Sensor Chemstore at none against Khrono's shown. Khrono's advantage is update cadence (every 2 months vs every 6 months) and iOS requirement (15.1 vs 17.2). On price, 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.

Sensor Chemstore ships an update every 6 months, Khrono every 2 months. The most recent releases landed on May 16, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Sensor Chemstore | Khrono |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 2 months** |
| Size | 51 MB | 39 MB |
| Requires iOS | 17.2 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Sensor Chemcontrol AS](https://appshunter.io/developer/1498593538) | [AutoMagi Ltd.](https://appshunter.io/developer/399892535) |

## What reviewers say

### Sensor Chemstore

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Khrono

[App page](https://appshunter.io/ios/app/khrono/id1512644292)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sensor Chemstore free?

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

### Is Khrono free?

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

### Do Sensor Chemstore or Khrono have ads?

Khrono shows ads; Sensor Chemstore does not.

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

Sensor Chemstore ships an update every 6 months, and Khrono every 2 months. Most recently, Sensor Chemstore was updated on May 16, 2026 and Khrono on September 15, 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.*