# TankID vs OELCHECK 4.0

TankID and OELCHECK 4.0 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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 3 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | TankID | OELCHECK 4.0 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | — | Free |
| Size | 2 MB | 8 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Wikon Kommunikationstechnik GmbH](https://appshunter.io/developer/472943917) | [OELCHECK GmbH](https://appshunter.io/developer/1210793145) |

## What reviewers say

### TankID

[App page](https://appshunter.io/ios/app/tankid/id1184245882)

**Features:** macOS Compatibility

**In-app purchases:** none


### OELCHECK 4.0

[App page](https://appshunter.io/ios/app/oelcheck-40/id1474067028)

Streamline lubricant and operating fluid sample management. Easily enter data, view lab reports, and manage machine information anytime, even offline. Optimize your analysis kits with this efficient digital tool.

**Highlights:** Sample data entry via QR code or machine search, Offline data entry and online synchronization, View sample status and lab reports, Attach up to five photos per sample, Manage machine data, Optimized analysis kit usage

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TankID free?

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

### Is OELCHECK 4.0 free?

OELCHECK 4.0 is free to download, with no in-app purchases.

### Do TankID or OELCHECK 4.0 have ads?

Neither TankID nor OELCHECK 4.0 shows ads.

### Which is updated more often, TankID or OELCHECK 4.0?

TankID ships an update every 3 months, and OELCHECK 4.0 every 3 months. Most recently, TankID was updated on November 2, 2026 and OELCHECK 4.0 on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*