Histo‪!‬ 12+

Learn Histology Efficiently‪!‬

John Ash

    • 5.0 • 27 Ratings
    • $9.99



A 50% discount is available to educational institutions for purchases of 20 or more copies through the Apple School Manager.

Histo! helps you learn histology and test your knowledge. It is the favorite study aid of medical and dental students in histology courses at the University of Utah.

The App currently contains 2179 identification slides, based on 547 photomicrographic images. It is organized into 19 Main Topics and 148 Subtopics.

It does not require an internet connection.

•Three navigation menus are provided, one to choose among the Main Topics, a second to select Subtopics of the Main Topics, and a Search feature to find slides using 675 keywords. These meus allow you focus your study as broadly or narrowly as desired.
•Once slides are displayed, a one-finger left or right swipe moves forward or backward by one slide, a two-finger swipe jumps 10 slides.

•This mode presents 92 micrographs that cover the Main Topics. Important structural features are named, and short explanations are given. These micrographs provide an efficient way for anyone new to a topic to quickly learn the identifications and spatial relationships of the microanatomy that are key for identifying tissues and organs.
•The labels can be turned on and off by tapping, allowing immediate self-testing while learning.

•These modes are based on 2087 questions and answers related to 455 micrographs.
•In the Learn mode, each slide displays a question, the answer, and a short explanation. The slides are presented in a logical order that helps you learn the material.
•In the Quiz mode, only the question is shown, and the order of presentation is randomized. You can tap to see the answer and explanation. A Quiz persists until the user deletes it.
•In the Test mode, you tap to display the built-in keyboard to answer the question, then grade your response. Results for each Main Topic are shown when you have finished a Test.

•Histo! addresses both microanatomy and functional histology. About 70% of the LQT slides ask for identification of structures, the remainder are related to other features of these structures, such as functions, molecular components, or diseases.
•From the Main Topic menu, you choose whether to review structures or other features, or both.

•Slides in any mode may be marked for later review. This happens automatically when you miss a question in the Test mode, and by tapping a button in the Label, Learn, or Quiz modes.
•Whenever you return to the Start screen, either during a session or later after exiting, you are offered the chance to review slides marked in any of the four modes. Buttons to review marked slides are also present on the Main and Subtopics menus.
•Slides that have been marked can be unmarked during a review by scoring the question as completely correct in the Test mode or tapping a button in the Learn or Quiz modes.

•Identifiers for slides viewed in the Labeled, Learn or Quiz modes can be recorded and then distributed via electronic documents. Anyone importing these identifiers can view the slides in the Learn mode.
•Students can ask for help with a structural or functional question related to a specific slide and instructors can present preselected examples to an individual or group.

What’s New

Version 1.3.22

•The Search feature presents slides containing images and/or text that are related to keywords, such as aorta, glomerulus, or zona pellucida.
•A process for showing any of the 2179 slides has been added.
•A link to Instructions on the Start window provides descriptions of all aspects of the app.

Ratings and Reviews

5.0 out of 5
27 Ratings

27 Ratings

ResidentDoc ,


This app is so convenient. It’s a great way to learn and test with so many high quality images and concise explanations. I like that I can use my phone or iPad. It’s an easy way to quiz myself when waiting in line for coffee or on public transit. Great work!! Medical students will find this very helpful in reviewing histology and prepping for Step 1.

Auggie(Swish) ,

Great for familiarization and learning functions

This is a fantastic resource. I wish there was a next and back button. I am not a huge fan of the randomness all the time, I want to cover one specific slide for all 7 labels (if there are that many) right in a a row, but it jumps around to random places.

TRadicus ,

Histo! Deserves the !

This app is so helpful! The pictures are good and the descriptions are clear. Everything is easy to navigate. I especially like being able to mark slides that give me trouble and go back anytime I want to look at them again.

App Privacy

The developer, John Ash, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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