# HerpMapper vs Fevig Oil

The clearest difference is update cadence: HerpMapper at every 3 months against Fevig Oil's every 6 months. Fevig Oil's advantage is iOS requirement (12.2 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

HerpMapper ships an update every 3 months, Fevig Oil every 6 months. The most recent releases landed on October 1, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | HerpMapper | Fevig Oil |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (24 ratings)](https://appshunter.io/ios/app/herpmapper/id1266037481/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 41.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | Free | — |
| Size | 67 MB | 56 MB |
| Requires iOS | 15.0 | **12.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Donald Becker](https://appshunter.io/developer/525324975) | [Rural Computer Consultants, Inc.](https://appshunter.io/developer/640795441) |

## 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


### Fevig Oil

[App page](https://appshunter.io/ios/app/fevig-oil/id6466827434)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HerpMapper free?

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

### Is Fevig Oil free?

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

### Do HerpMapper or Fevig Oil have ads?

Neither HerpMapper nor Fevig Oil shows ads.

### Which is updated more often, HerpMapper or Fevig Oil?

HerpMapper ships an update every 3 months, and Fevig Oil every 6 months. Most recently, HerpMapper was updated on October 1, 2026 and Fevig Oil on September 17, 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.*