# Feed Calc vs ASPEN ebook

The clearest difference is iOS requirement: Feed Calc at 12.1 against ASPEN ebook's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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 October 28, 2026 respectively.

## The numbers

| Metric | Feed Calc | ASPEN ebook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/feed-calc/id1455730783/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | — |
| Size | 18 MB | 112 MB |
| Requires iOS | **12.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Baby Memorial Hospital](https://appshunter.io/developer/1282308499) | [American Society for Parenteral and Enteral Nutrition (A.S.P.E.N.)](https://appshunter.io/developer/672253901) |

## What reviewers say

### Feed Calc

[App page](https://appshunter.io/ios/app/feed-calc/id1455730783)

This app assists healthcare professionals in quickly calculating formula feeds commonly used in hospitals. It provides information for dietitians, physicians, and other medical staff, emphasizing that it is not a substitute for professional medical advice.

**Highlights:** Formula feed calculation, Hospital common formulas, Dietitian tool, Physician resource, Healthcare professional guide

**Features:** macOS Compatibility

**In-app purchases:** none


### ASPEN ebook

[App page](https://appshunter.io/ios/app/aspen-ebook/id6748378007)

**In-app purchases:** none


## Frequently asked questions

### Is Feed Calc free?

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

### Is ASPEN ebook free?

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

### Do Feed Calc or ASPEN ebook have ads?

Neither Feed Calc nor ASPEN ebook shows ads.

### Which is updated more often, Feed Calc or ASPEN ebook?

Feed Calc ships an update every 3 months, and ASPEN ebook every 3 months. Most recently, Feed Calc was updated on November 2, 2026 and ASPEN ebook on October 28, 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.*