# Flexnap vs KALKUL

The clearest difference is update cadence: Flexnap at every 2 days against KALKUL's every 6 days. 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.

Flexnap ships an update every 2 days, KALKUL every 6 days. The most recent releases landed on October 15, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Flexnap | KALKUL |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 6 days |
| Size | 127 MB | 71 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [FLEXNAP, INC.](https://appshunter.io/developer/1479713209) | [Kalkul Inc.](https://appshunter.io/developer/1357921921) |

## What reviewers say

### Flexnap

[App page](https://appshunter.io/ios/app/flexnap/id1479713210)

**In-app purchases:** none


### KALKUL

[App page](https://appshunter.io/ios/app/kalkul/id6636494668)

**In-app purchases:** none


## Frequently asked questions

### Is Flexnap free?

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

### Is KALKUL free?

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

### Do Flexnap or KALKUL have ads?

Neither Flexnap nor KALKUL shows ads.

### Which is updated more often, Flexnap or KALKUL?

Flexnap ships an update every 2 days, and KALKUL every 6 days. Most recently, Flexnap was updated on October 15, 2026 and KALKUL on October 18, 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.*