# Data Rhythm vs ieRcalc

The clearest difference is ads: ieRcalc at none against Data Rhythm's shown. ieRcalc also leads on update cadence (every 4 days vs every 3 weeks) and device support (3 vs 1). On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Data Rhythm ships an update every 3 weeks, ieRcalc every 4 days. The most recent releases landed on October 9, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Data Rhythm | ieRcalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 17 MB | 37 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Masaki Hayashi](https://appshunter.io/developer/1609931545) | [REI KAMIKURA](https://appshunter.io/developer/1896764006) |

## What reviewers say

### Data Rhythm

[App page](https://appshunter.io/ios/app/data-rhythm/id1639696025)

**Features:** macOS Compatibility

**In-app purchases:** none


### ieRcalc

[App page](https://appshunter.io/ios/app/iercalc/id6771453728)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Data Rhythm free?

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

### Is ieRcalc free?

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

### Do Data Rhythm or ieRcalc have ads?

Data Rhythm shows ads; ieRcalc does not.

### Which is updated more often, Data Rhythm or ieRcalc?

Data Rhythm ships an update every 3 weeks, and ieRcalc every 4 days. Most recently, Data Rhythm was updated on October 9, 2026 and ieRcalc on October 25, 2026.

---

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