# Constipation Diary vs OpenEvidence

The clearest difference is review sentiment: OpenEvidence at 81% against Constipation Diary's 17%. OpenEvidence also leads on rating (4.9 vs 2.3) and update cadence (weekly vs every 2 months). Constipation Diary's advantage is iOS requirement (13.0 vs 15.1). 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.

OpenEvidence holds the better App Store score, 4.9 against 2.3. That said, the two scores are not equally well evidenced: OpenEvidence has 12K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 17% of Constipation Diary's written reviews are positive against 81% of OpenEvidence's.

Constipation Diary ships an update every 2 months, OpenEvidence weekly. The most recent releases landed on October 14, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Constipation Diary | OpenEvidence |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (7 ratings)](https://appshunter.io/ios/app/constipation-diary/id1438081421/reviews) | **[4.9 (12K ratings)](https://appshunter.io/ios/app/openevidence/id6612007783/reviews)** |
| Number of ratings | 7 | **12K** |
| Positive reviews | 16.7% of reviews | **80.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free | Free |
| Best chart rank | — | **#34** |
| Size | 11 MB | 95 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | +17 |
| Developer | [Amalesh Sanku](https://appshunter.io/developer/1387171071) | [OpenEvidence Inc.](https://appshunter.io/developer/1761260627) |

## What reviewers say

### Constipation Diary

[App page](https://appshunter.io/ios/app/constipation-diary/id1438081421)

This app helps individuals track daily bowel movements and related symptoms to better understand and manage constipation. It's designed for prospective assessment in clinical trials and for personal health management.

**Highlights:** Daily symptom tracking, Bowel movement frequency, Stooling habit recording, Constipation assessment, Clinical trial data collection, Patient-reported outcomes

**Features:** macOS Compatibility

**In-app purchases:** none


### OpenEvidence

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

**Currently charting:** #34 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 Constipation Diary free?

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

### Is OpenEvidence free?

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

### Which has better reviews, Constipation Diary or OpenEvidence?

OpenEvidence is rated higher. Constipation Diary averages 2.3 out of 5 from 7 ratings, while OpenEvidence averages 4.9 from 12K ratings.

### Do Constipation Diary or OpenEvidence have ads?

Neither Constipation Diary nor OpenEvidence shows ads.

### Which is updated more often, Constipation Diary or OpenEvidence?

Constipation Diary ships an update every 2 months, and OpenEvidence weekly. Most recently, Constipation Diary was updated on October 14, 2026 and OpenEvidence on October 18, 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.*