# Monarch SOS vs HabiTally

The clearest difference is update cadence: Monarch SOS at every 5 weeks against HabiTally's every 43 months. Monarch SOS also leads on ratings volume (18 vs 5) and iOS requirement (13.0 vs 15.6). HabiTally's advantage is rating (5.0 vs 4.6). On price, review sentiment, 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.

HabiTally holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 18 and 5 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Monarch SOS ships an update every 5 weeks, HabiTally every 43 months. Both last shipped on October 16, 2026.

## The numbers

| Metric | Monarch SOS | HabiTally |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (18 ratings)](https://appshunter.io/ios/app/monarch-sos/id956347677/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/habitally/id1464056499/reviews)** |
| Number of ratings | **18** | 5 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 43 months |
| Monetization | Free | Free |
| Size | 176 MB | 68 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Naturedigger LLC](https://appshunter.io/developer/658672412) | [Iowa State University of Science and Technology](https://appshunter.io/developer/433925044) |

## What reviewers say

### Monarch SOS

[App page](https://appshunter.io/ios/app/monarch-sos/id956347677)

Identify monarch butterflies and their host plants with this comprehensive field guide. Learn about their life cycle, threats, and conservation efforts. Compare look-alike species and stay updated on migration news.

**Highlights:** Monarch identification guide, Life cycle stages, Confusing look-alike comparison, Milkweed species identification, Conservation efforts information, Migration news updates

**In-app purchases:** none


### HabiTally

[App page](https://appshunter.io/ios/app/habitally/id1464056499)

This app allows users to record data about their monarch butterfly habitat conservation efforts. The collected, anonymized data is shared with conservation groups to help monarch populations recover.

**Highlights:** Record habitat conservation data, Support monarch butterfly recovery, Anonymized data aggregation, Data shared with conservation parties, Citizen science for wildlife

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Monarch SOS free?

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

### Is HabiTally free?

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

### Which has better reviews, Monarch SOS or HabiTally?

HabiTally is rated higher. Monarch SOS averages 4.6 out of 5 from 18 ratings, while HabiTally averages 5.0 from 5 ratings.

### Do Monarch SOS or HabiTally have ads?

Neither Monarch SOS nor HabiTally shows ads.

### Which is updated more often, Monarch SOS or HabiTally?

Monarch SOS ships an update every 5 weeks, and HabiTally every 43 months. Most recently, Monarch SOS was updated on October 16, 2026 and HabiTally on October 16, 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.*