# TPMS Chart vs OKM100

The clearest difference is update cadence: TPMS Chart at every 3 weeks against OKM100's every 6 weeks. 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.

TPMS Chart ships an update every 3 weeks, OKM100 every 6 weeks. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | TPMS Chart | OKM100 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Size | 52 MB | 102 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SYSGRATION](https://appshunter.io/developer/833548921) | [Shenzhen Keelray Technology Co.,Ltd](https://appshunter.io/developer/1643634723) |

## What reviewers say

### TPMS Chart

[App page](https://appshunter.io/ios/app/tpms-chart/id1468856989)

**In-app purchases:** none


### OKM100

[App page](https://appshunter.io/ios/app/okm100/id6482984403)

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

**In-app purchases:** none


## Frequently asked questions

### Is TPMS Chart free?

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

### Is OKM100 free?

OKM100 is free to download, with no in-app purchases.

### Do TPMS Chart or OKM100 have ads?

Neither TPMS Chart nor OKM100 shows ads.

### Which is updated more often, TPMS Chart or OKM100?

TPMS Chart ships an update every 3 weeks, and OKM100 every 6 weeks. Most recently, TPMS Chart was updated on October 7, 2026 and OKM100 on October 1, 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.*