# Guide to Diagnostic Tests vs TDS Mobile

The clearest difference is rating: Guide to Diagnostic Tests at 4.6 against TDS Mobile's 2.2. Guide to Diagnostic Tests also leads on ads (none vs shown). TDS Mobile's advantage is in-app purchases (none vs 1) and update cadence (every 3 months vs every 9 months). On price, review sentiment, ratings volume and device support there is nothing between them.

Both are free to download. Guide to Diagnostic Tests sells 1 one-off in-app purchase. TDS Mobile asks for nothing beyond the download.

Guide to Diagnostic Tests holds the better App Store score, 4.6 against 2.2. Both are backed by a comparable volume of ratings — 35 and 17 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

Guide to Diagnostic Tests ships an update every 9 months, TDS Mobile every 3 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Guide to Diagnostic Tests | TDS Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (35 ratings)](https://appshunter.io/ios/app/guide-to-diagnostic-tests/id910130424/reviews)** | [2.2 (17 ratings)](https://appshunter.io/ios/app/tds-mobile/id922824159/reviews) |
| Number of ratings | **35** | 17 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 3 months** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 10 MB | 30 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) | [The TDS Group, Inc](https://appshunter.io/developer/1448062399) |

## What reviewers say

### Guide to Diagnostic Tests

[App page](https://appshunter.io/ios/app/guide-to-diagnostic-tests/id910130424)

Access evidence-based information on over 450 diagnostic tests, including lab work, imaging, and therapeutic monitoring. This resource helps healthcare professionals quickly find answers to common questions about test selection, interpretation, and patient preparation.

**Highlights:** 450+ diagnostic tests, Evidence-based recommendations, Algorithms, tables, and charts, PubMed links, Custom notes and highlighting, Full-text search, Favorites for bookmarking

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pocket Guide to Diagnostic Tests | $54.99 | one-time |


### TDS Mobile

[App page](https://appshunter.io/ios/app/tds-mobile/id922824159)

Manage your Section 125 and HSA accounts, fund your HSA, and submit claims with receipts. View transaction details, alerts, and contact your administrator. Features include enhanced authentication, profile management, and card services.

**Highlights:** Section 125 account management, HSA funding and claims submission, Receipt uploads, Transaction and alert viewing, Administrator contact, Card management and PIN viewing, New user registration

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Guide to Diagnostic Tests free?

Guide to Diagnostic Tests is free to download, with in-app purchases available.

### Is TDS Mobile free?

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

### Which has better reviews, Guide to Diagnostic Tests or TDS Mobile?

Guide to Diagnostic Tests is rated higher. Guide to Diagnostic Tests averages 4.6 out of 5 from 35 ratings, while TDS Mobile averages 2.2 from 17 ratings.

### Do Guide to Diagnostic Tests or TDS Mobile have ads?

TDS Mobile shows ads; Guide to Diagnostic Tests does not.

### Which is updated more often, Guide to Diagnostic Tests or TDS Mobile?

Guide to Diagnostic Tests ships an update every 9 months, and TDS Mobile every 3 months. Most recently, Guide to Diagnostic Tests was updated on October 27, 2026 and TDS Mobile on October 24, 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.*