# CALF™ vs Kidney2Go

The clearest difference is in-app purchases: CALF™ at none against Kidney2Go's 1. CALF™ also leads on iOS requirement (11.0 vs 14.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Kidney2Go sells 1 in-app purchase, starting at $49.99 per year. CALF™ asks for nothing beyond the download.

CALF™ ships an update monthly, Kidney2Go every 2 weeks. The most recent releases landed on October 3, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | CALF™ | Kidney2Go |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/kidney2go/id6464635859/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | — | Subscription |
| Size | 89 MB | 34 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [NuVeda Learning Private Limited](https://appshunter.io/developer/1272718926) | [Portable Information Solutions, LLC](https://appshunter.io/developer/1812632881) |

## What reviewers say

### CALF™

[App page](https://appshunter.io/ios/app/calf/id1272718927)

**In-app purchases:** none


### Kidney2Go

[App page](https://appshunter.io/ios/app/kidney2go/id6464635859)

A comprehensive medical handbook for healthcare professionals, offering concise diagnostic, evaluation, and treatment information for kidney diseases. It includes practical tools like calculators and clinical images, with content regularly updated from the cloud.

**Highlights:** Kidney disease diagnosis, evaluation, and treatment, Kidney transplant management, Dialysis technical information, Key citations for each topic, Clinical photographs and calculators, Cloud-based content updates, Search functionality and favorites

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kidney2Go Annual Subscription | $49.99 | per year |


## Frequently asked questions

### Is CALF™ free?

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

### Is Kidney2Go free?

Kidney2Go is free to download, with in-app purchases available.

### Do CALF™ or Kidney2Go have ads?

Neither CALF™ nor Kidney2Go shows ads.

### Which is updated more often, CALF™ or Kidney2Go?

CALF™ ships an update monthly, and Kidney2Go every 2 weeks. Most recently, CALF™ was updated on October 3, 2026 and Kidney2Go on October 21, 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.*