# Sanford Guide Antimicrobial vs RezClock

The clearest difference is review sentiment: Sanford Guide Antimicrobial at 85% against RezClock's 0%. Sanford Guide Antimicrobial also leads on rating (4.8 vs 2.3) and update cadence (every 3 weeks vs every 35 months). RezClock's advantage is iOS requirement (10.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Sanford Guide Antimicrobial sells 3 in-app purchases, starting at $4.99 per year and RezClock sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Sanford Guide Antimicrobial holds the better App Store score, 4.8 against 2.3. That said, the two scores are not equally well evidenced: Sanford Guide Antimicrobial has 1.9K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 85% of Sanford Guide Antimicrobial's written reviews are positive against 0% of RezClock's.

Sanford Guide Antimicrobial ships an update every 3 weeks, RezClock every 35 months. The most recent releases landed on September 24, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | Sanford Guide Antimicrobial | RezClock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.9K ratings)](https://appshunter.io/ios/app/sanford-guide-antimicrobial/id863196620/reviews)** | [2.3 (3 ratings)](https://appshunter.io/ios/app/rezclock/id988755622/reviews) |
| Number of ratings | **1.9K** | 3 |
| Positive reviews | **84.7% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 35 months |
| Monetization | Subscription | Subscription |
| Best chart rank | **#9** | — |
| Size | 44 MB | 24 MB |
| Requires iOS | 15.0 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Antimicrobial Therapy, Inc.](https://appshunter.io/developer/443442554) | [Mitra U.S. Computer Solutions, Inc](https://appshunter.io/developer/988434177) |

## What reviewers say

### Sanford Guide Antimicrobial

[App page](https://appshunter.io/ios/app/sanford-guide-antimicrobial/id863196620)

**Currently charting:** #9 Top Grossing · Medical (US App Store)

Provides clinicians with concise, evidence-based treatment guidance for infectious diseases. Features interactive tools like spectra charts, drug interaction checkers, and dosing calculators to support rapid decision-making in fast-paced medical settings.

**Highlights:** Clinically actionable answers, Institutionally diverse editorial team, Constant updates, Interactive antibacterial spectra chart, Drug-drug interaction checker, Trustworthy dosing calculators

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| U.S. Vaccine Guidelines | $4.99 | per year |
| Sanford Guide | $39.99 | per year |
| Sanford Guide All Access | $79.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 🚀 Quick access to information
- 💡 Helpful charts and tables
- 🔍 Comprehensive coverage of infections and treatments
- 📚 Up-to-date content and frequent updates

**What reviewers complain about**

- 🐛 Occasional crashes or freezing
- ⏱️ Slow search function
- 💰 Expensive subscription model
- 🔒 Login issues and subscription verification problems

**Reported bugs**

- App freezing or closing unexpectedly
- Login and subscription verification problems
- Corrupted passwords and inability to reset

**Requested features**

- Side-by-side antibiotic susceptibility comparison
- Offline access to content
- Improved navigation and UI


### RezClock

[App page](https://appshunter.io/ios/app/rezclock/id988755622)

Automates medical resident duty hour tracking using location services to log arrival and departure times at clinical sites. Hours can be uploaded to other systems for generating ACGME required reports. Offers a free trial period before subscription.

**Highlights:** Automated time tracking, Location-based geofencing, Duty hours reporting, Data upload to MedProSuite, Free trial period

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RezClock Monthly - $0.99/month | $0.99 | per month |


## Frequently asked questions

### Is Sanford Guide Antimicrobial free?

Sanford Guide Antimicrobial is free to download, with in-app purchases available.

### Is RezClock free?

RezClock is free to download, with in-app purchases available.

### Which has better reviews, Sanford Guide Antimicrobial or RezClock?

Sanford Guide Antimicrobial is rated higher. Sanford Guide Antimicrobial averages 4.8 out of 5 from 1.9K ratings, while RezClock averages 2.3 from 3 ratings.

### Do Sanford Guide Antimicrobial or RezClock have ads?

Neither Sanford Guide Antimicrobial nor RezClock shows ads.

### Which is updated more often, Sanford Guide Antimicrobial or RezClock?

Sanford Guide Antimicrobial ships an update every 3 weeks, and RezClock every 35 months. Most recently, Sanford Guide Antimicrobial was updated on September 24, 2026 and RezClock on June 11, 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.*