# RFF Index vs SIMPL

The clearest difference is rating: RFF Index at 5.0 against SIMPL's 4.1. SIMPL's advantage is update cadence (every 2 weeks vs every 3 months) and ratings volume (16 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

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

RFF Index holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: SIMPL has 16 ratings behind it against 2, so its average is the more settled of the two.

RFF Index ships an update every 3 months, SIMPL every 2 weeks. The most recent releases landed on October 3, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | RFF Index | SIMPL |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rff-index/id1557635049/reviews)** | [4.1 (16 ratings)](https://appshunter.io/ios/app/simpl/id1660627978/reviews) |
| Number of ratings | 2 | **16** |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 1 MB | 37 MB |
| Requires iOS | **14.1** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Edward Vendrow](https://appshunter.io/developer/1553335805) | [Procedural Learning and Safety Collaborative, Inc](https://appshunter.io/developer/970265410) |

## What reviewers say

### RFF Index

[App page](https://appshunter.io/ios/app/rff-index/id1557635049)

This app helps healthcare professionals quickly assess the baseline frailty of older adults admitted with traumatic rib fractures. It provides a risk score and estimates potential outcomes based on frailty levels. The tool is intended to supplement clinical judgment, not replace it.

**Highlights:** Frailty assessment for older adults, Rib fracture patient characterization, RFF score calculation, Risk of frailty identification, Population-level outcome estimates

**Features:** macOS Compatibility

**In-app purchases:** none


### SIMPL

[App page](https://appshunter.io/ios/app/simpl/id1660627978)

This app facilitates workplace-based assessments for medical professionals, enabling the evaluation of entrustable professional activities within medical education settings.

**Highlights:** Workplace-based assessments, Entrustable professional activities, Medical education implementation, Professional development tracking

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RFF Index free?

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

### Is SIMPL free?

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

### Which has better reviews, RFF Index or SIMPL?

RFF Index is rated higher. RFF Index averages 5.0 out of 5 from 2 ratings, while SIMPL averages 4.1 from 16 ratings.

### Do RFF Index or SIMPL have ads?

Neither RFF Index nor SIMPL shows ads.

### Which is updated more often, RFF Index or SIMPL?

RFF Index ships an update every 3 months, and SIMPL every 2 weeks. Most recently, RFF Index was updated on October 3, 2026 and SIMPL on October 5, 2026.

---

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