# OPTICHECK Level Mobile vs TELEDYNE ISCO FlowCalc

The clearest difference is ads: OPTICHECK Level Mobile at none against TELEDYNE ISCO FlowCalc's shown. OPTICHECK Level Mobile also leads on iOS requirement (11.0 vs 13.4). TELEDYNE ISCO FlowCalc's advantage is update cadence (weekly vs every 3 months). 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.

OPTICHECK Level Mobile ships an update every 3 months, TELEDYNE ISCO FlowCalc weekly. The most recent releases landed on October 25, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | OPTICHECK Level Mobile | TELEDYNE ISCO FlowCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/teledyne-isco-flowcalc/id6504916802/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | — | Ad-supported |
| Size | 242 MB | 26 MB |
| Requires iOS | **11.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KROHNE Messtechnik GmbH](https://appshunter.io/developer/1445655816) | [FutureSight Studios Ltd](https://appshunter.io/developer/1752834411) |

## What reviewers say

### OPTICHECK Level Mobile

[App page](https://appshunter.io/ios/app/opticheck-level-mobile/id1596750666)

**Features:** macOS Compatibility

**In-app purchases:** none


### TELEDYNE ISCO FlowCalc

[App page](https://appshunter.io/ios/app/teledyne-isco-flowcalc/id6504916802)

This utility app provides quick and accurate open channel flow rate calculations for field or office use. Select your measurement method, enter dimensions and head/velocity, and receive instant results. It supports multiple flow methods, area-velocity calculations, and unit switching.

**Highlights:** Instant flow rate calculations, Multiple weir and flume types, Area-velocity mode for pipes, Save favorite site setups, Imperial and metric unit support, Based on ISCO Handbook formulas

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OPTICHECK Level Mobile free?

OPTICHECK Level Mobile is free to download, with no in-app purchases.

### Is TELEDYNE ISCO FlowCalc free?

TELEDYNE ISCO FlowCalc is free to download, with no in-app purchases.

### Do OPTICHECK Level Mobile or TELEDYNE ISCO FlowCalc have ads?

TELEDYNE ISCO FlowCalc shows ads; OPTICHECK Level Mobile does not.

### Which is updated more often, OPTICHECK Level Mobile or TELEDYNE ISCO FlowCalc?

OPTICHECK Level Mobile ships an update every 3 months, and TELEDYNE ISCO FlowCalc weekly. Most recently, OPTICHECK Level Mobile was updated on October 25, 2026 and TELEDYNE ISCO FlowCalc on October 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.*