# Orchidometer vs OpenEvidence

The clearest difference is price: OpenEvidence at Free against Orchidometer's $7.99. OpenEvidence also leads on rating (4.9 vs 4.0) and ratings volume (12K vs 2). Orchidometer's advantage is review sentiment (100% vs 81%). On update cadence, ads, in-app purchases and device support there is nothing between them.

OpenEvidence is free to download; Orchidometer costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OpenEvidence holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: OpenEvidence has 12K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 100% of Orchidometer's written reviews are positive against 81% of OpenEvidence's, so the app with the better star average is not the one people write more warmly about.

Orchidometer ships an update every 11 days, OpenEvidence weekly. The most recent releases landed on October 8, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Orchidometer | OpenEvidence |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/orchidometer/id1542541641/reviews) | **[4.9 (12K ratings)](https://appshunter.io/ios/app/openevidence/id6612007783/reviews)** |
| Number of ratings | 2 | **12K** |
| Positive reviews | **100.0% of reviews** | 81.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 days | **Weekly** |
| Monetization | Paid | **Free** |
| Best chart rank | — | **#31** |
| Size | 15 MB | 95 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | +17 |
| Developer | [TotalContent](https://appshunter.io/developer/1542541643) | [OpenEvidence Inc.](https://appshunter.io/developer/1761260627) |

## What reviewers say

### Orchidometer

[App page](https://appshunter.io/ios/app/orchidometer/id1542541641)

This medical app helps users measure and track testicular volume. It can be used to assess normal development, identify potential associations with conditions like Klinefelter syndrome or testicular atrophy, and monitor changes over time.

**Highlights:** Measure testicular volume, Track volume changes, Estimate Tanner stage, Assess pubertal development, Save and visualize measurements, Identify potential medical associations

**Features:** Vision Pro support

**In-app purchases:** none


### OpenEvidence

[App page](https://appshunter.io/ios/app/openevidence/id6612007783)

**Currently charting:** #31 Top Free · Medical (US App Store)

This app provides healthcare professionals with evidence-based clinical decision support and medical information. It acts as a search engine, sourcing answers from peer-reviewed literature and leading medical organizations to aid in high-stakes medical decisions at the point of care.

**Highlights:** Clinical decision support, Medical search engine, Sourced from peer-reviewed literature, FDA and CDC data integration, Partnerships with leading medical journals, Verified healthcare professional access

**Features:** Siri integration

**In-app purchases:** none

**What reviewers like**

- 🚀 Accurate and concise answers
- 💡 Provides references and sources
- 👍 Helpful for clinical practice
- 🚀 Efficient search and retrieval
- 👍 Invaluable quick reference tool

**What reviewers complain about**

- 🐛 App not working in latest update
- ⚠️ Requires specific prompts for complete information

**Reported bugs**

- App not working in latest update

**Requested features**

- Availability on MacBook
- Integration with clinical workflows and EMRs


## Frequently asked questions

### Is Orchidometer free?

Orchidometer costs $7.99, with no in-app purchases.

### Is OpenEvidence free?

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

### Which has better reviews, Orchidometer or OpenEvidence?

OpenEvidence is rated higher. Orchidometer averages 4.0 out of 5 from 2 ratings, while OpenEvidence averages 4.9 from 12K ratings.

### Do Orchidometer or OpenEvidence have ads?

Neither Orchidometer nor OpenEvidence shows ads.

### Which is updated more often, Orchidometer or OpenEvidence?

Orchidometer ships an update every 11 days, and OpenEvidence weekly. Most recently, Orchidometer was updated on October 8, 2026 and OpenEvidence on October 22, 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.*