# HerpMapper vs SF Study

The clearest difference is rating: SF Study at 5.0 against HerpMapper's 3.5. HerpMapper's advantage is ratings volume (24 vs 1). 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.

SF Study holds the better App Store score, 5.0 against 3.5. That said, the two scores are not equally well evidenced: HerpMapper has 24 ratings behind it against 1, so its average is the more settled of the two.

HerpMapper ships an update every 3 months, SF Study every 6 weeks. Both last shipped on October 1, 2026.

## The numbers

| Metric | HerpMapper | SF Study |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (24 ratings)](https://appshunter.io/ios/app/herpmapper/id1266037481/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sf-study-parent-hub/id6473803780/reviews)** |
| Number of ratings | **24** | 1 |
| Positive reviews | 41.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 67 MB | 26 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Donald Becker](https://appshunter.io/developer/525324975) | [dfusion, Inc](https://appshunter.io/developer/1532980185) |

## What reviewers say

### HerpMapper

[App page](https://appshunter.io/ios/app/herpmapper/id1266037481)

Record reptile and amphibian observations with photos, sounds, and GPS locations. Your data supports scientific research and conservation efforts globally. Access your findings online and contribute to a shared database.

**Highlights:** Record observations with photos and sound, Automatic GPS location tagging, Offline recording capability, Searchable herpetofauna database, Data contribution to research and conservation, View records on the HerpMapper website

**Features:** macOS Compatibility

**In-app purchases:** none


### SF Study

[App page](https://appshunter.io/ios/app/sf-study-parent-hub/id6473803780)

This app provides parents of youth with Autism Spectrum Disorder (ASD) with resources to learn about and discuss various topics. It aims to facilitate communication and understanding between parents and their children.

**Highlights:** Learn about topics relevant to youth with ASD, Facilitate communication with youth, Support for parents of children with ASD, Resource hub for ASD-related discussions

**In-app purchases:** none


## Frequently asked questions

### Is HerpMapper free?

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

### Is SF Study free?

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

### Which has better reviews, HerpMapper or SF Study?

SF Study is rated higher. HerpMapper averages 3.5 out of 5 from 24 ratings, while SF Study averages 5.0 from 1 ratings.

### Do HerpMapper or SF Study have ads?

Neither HerpMapper nor SF Study shows ads.

### Which is updated more often, HerpMapper or SF Study?

HerpMapper ships an update every 3 months, and SF Study every 6 weeks. Most recently, HerpMapper was updated on October 1, 2026 and SF Study on October 1, 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.*