# AnSo — Anaesthesia Sonoanatomy

> Anesthesia sonoanatomy resource for identifying structures and performing ultrasound-guided procedures. (iPhone/iPad app by Sumo Enterprises Pty Ltd.)

- Source: https://appshunter.io/ios/app/anso/id1627451047 (this page in markdown: same URL + `.md`)
- Developer: [Sumo Enterprises Pty Ltd](https://appshunter.io/developer/1202779263)
- Category: Medical, Reference
- Price: Free with in-app purchases
- Rating: 3.50/5 from 30 App Store ratings · 46 written reviews indexed
- Age rating: 17+
- Requires: iOS 13.0 · 72 MB
- Languages: American English
- Released: 2022-08-08
- Data updated: 2026-09-04
- Monetization: subscription
- User reviews in markdown: https://appshunter.io/ios/app/anso/id1627451047/reviews.md

## What is AnSo?

AnSo is a convenient resource designed to help anaesthetists identify common sonoanatomy, in a time efficient manner, within the busy operating theatre. It has been created by practicing anaesthetists with an interest in teaching ultrasound and regional anaesthesia.

Please note that a subscription is required to access all content for this app. You can purchase a monthly or yearly subscription after signing in.

AnSo:
- provides multiple examples of the sonoanatomy as every individual is different,
- provides landmark sketches useful for developing pattern recognition of landmark structures, and for trainees to draw in exams,
- displays the cutaneous, motor, osseous and visceral innervation of the numerous nerve blocks and fascial plane blocks now available, facilitating appropriate block choice and knowledge of expected results,
- allows combining and comparing block innervation,
- allows images to be flipped to display both L and R sided orientation,
- demonstrates functional ergonomics with patient, ultrasound screen and proceduralist positioning essential for efficient practical performance,
- provides block notes with sonoanatomy tips and practical tips from experienced clinicians which can be invaluable to the learner.

AnSo is not only for regional anaesthesia but includes many other perioperative uses of ultrasound relevant to the anaesthetist, such as:
-      airway
-      gastric antrum
-      vascular access
-      spine
-      transthoracic echo
-      lung signs

AnSo contains:
- over 250 ultrasound images with over 1500 sonoanatomy colour overlays,
- innervation images,
- ergonomic images,
- landmarks pattern sketches,
- loops when required for dynamic sonoanatomy,
- notes with tips from experienced clinicians.

AnSo helps identify not only the target structures but all the surrounding sonoanatomy. This more comprehensive understanding of the sonoanatomy helps detect anatomical variability, improves the safety and efficacy of procedures, and facilitates learning and teaching.
AnSo has been designed in a format that can be easily updated and distributed to users so the information can be kept as current as possible in this rapidly expanding field.
AnSo does not require an internet connection to run. Once downloaded all data is stored on your device so it will work anywhere and images will display without any delay.  It can be useful both in and out of theatre, when performing procedures, and when learning or teaching ultrasound. There is no advertising in the app making it pleasant and time efficient to use.
Terms of use can be found at https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Download AnSo today and always have access to this sonoanatomy and nerve block resource.

## Key features

- Sonoanatomy identification
- Landmark sketches
- Nerve block innervation
- Ergonomic positioning guides
- Perioperative ultrasound uses
- Clinical tips and notes

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| AnSo Pro one year subscription | $5.99 | per year |
| AnSo Pro subscription | $5.99 | per year |
| AnSo one month subscription | $0.49 | per month |
| AnSo one year subscription | $5.99 | per year |


## Chart rankings

- #89 in Top Grossing · Medical (US App Store)

## Recent user reviews (10 of 46)

All indexed reviews: https://appshunter.io/ios/app/anso/id1627451047/reviews.md

### 5/5 — Daily driver

*2026-07-03*

This is a fantastic app. The interface is easy to navigate and the layered images are helpful. As a regional anaesthetist I recommend it freely for those learning RA and for quick knowledge checks in time-pressed situations.

### 5/5 — Fantastic app

*2026-07-03*

Such a great app. Use it daily in work. Every anaesthetist should have it.

### 5/5 — SRNA lifesaver

*2026-06-27*

Huge fan of this app while in CRNA school! There is not any other educational content I’ve found that has the views that we will see as anesthetists

### 2/5 — Great resource but buggy

*2026-04-22*

Love this app when it works.  Everytime you use it, it has to log you in.  I have a very poor internet connection at my facility which makes this app unreliable.  You should be able to use this app w/o needing to be connected, would give 5 star rating if this was the case.

**Developer response:** Hi kbmountain, Thanks for taking the time to write a review.
Please make sure you have the latest version. The app should work without an internet connection, with wifi off, or even in flight mode. If you leave the app running in the background it should reopen immediately. If you just close the app and do not sign out it should reopen within a couple of seconds. You should only have to sign in again if you sign out of the app. 
We have had a few technical issues over the first few months this year. They should all now be fixed.
If you continue to have trouble please email us at ansomf@gmail.com so we can help further.
kind regards
AnSo

### 5/5 — Now fixed

*2026-03-24*

Love AnSo as a resource, I have the pro version and it’s a great day to day resource. Thanks for continuing to update and add new content to this wonderful app.

### 1/5 — 登陆不了

*2026-03-20*

这个软件登录不上去，点击之后没有跳转

### 5/5 — 无法登录

*2026-03-13*

苹果账号登录后仍无法进入app.

### 3/5 — Currently broken?

*2026-03-05, version 2.3.3*

Love AnSo as a resource, I have the pro version and it’s a great day to day resource. However I think this app has recently broken - can’t get past the loading data initial stage. Please fix! No contact information on your website.

### 5/5 — 最近无法登录

*2026-02-26*

最近软件一直无法登录，利用Apple ID登录验证完毕后还是停留在登录的页面，没有任何的跳转

**Developer response:** Hi blackberrydu, Thanks for your feedback. Sorry for the inconvenience we have caused you with the app getting stuck loading data or showing missing content. We have fixed the technical issues and a new update with the fix is in the app store. Please delete your current version and download the latest store version. If you continue to have trouble with the latest store version please email us at ansomf@gmail.com with details of what is happening so we can look into it. Kind regards, AnSo

### 2/5 — Auto update needs fix

*2026-02-17*

Was previously more functional despite less content. Now it gets stuck auto updating which isn’t always feasible in theatre

**Developer response:** Thanks Shanah's intoxicant for the feedback. We will look at making the auto update an optional feature. kind regards AnSo.

## Frequently asked questions about AnSo

### What does this app do?

This app serves as a resource for anesthesiologists to identify common sonoanatomy and perform ultrasound-guided procedures. It provides detailed ultrasound images, landmark sketches, and innervation information for nerve blocks, as well as guidance on functional ergonomics and clinical tips.

### What are the key features of this app?

Key features include multiple sonoanatomy examples, landmark sketches for pattern recognition, detailed innervation displays for nerve blocks, comparison of block innervation, image flipping for orientation, functional ergonomics demonstrations, and block notes with tips from experienced clinicians.

### How much does this app cost?

A subscription is required to access all content. Users can choose between a monthly or yearly subscription after signing in. The app does not contain advertising.

### What kind of procedures does this app cover?

The app covers regional anesthesia, including numerous nerve blocks and fascial plane blocks. It also includes other perioperative uses of ultrasound relevant to anesthetists, such as airway, gastric antrum, vascular access, spine, transthoracic echo, and lung signs.

### Does this app require an internet connection?

No, this app does not require an internet connection to run. Once downloaded, all data is stored on your device, allowing it to work anywhere without delay in image display.

## Version history (last 5 releases)

### 2.3.7 — 2026-07-17

Fix for subscriptions

### 2.3.6 — 2026-04-16

- Better local caching to improve start up times
- Fixed image positioning on tablets
- Layout improvements for smaller screens
- Added ability save debug logs

### 2.3.3 — 2026-02-12

Fixed issues loading images.

### 2.3.2 — 2026-02-02

- Improvements to subscriptions flow for existing users.
- Allow app to start up even if image bundle download fails.

### 2.3.1 — 2026-01-27

- Fixed subscription recognition.
- Rename App to "AnSo"

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## Related topics

[anso](https://appshunter.io/ios/topics/anso) · [anso pro](https://appshunter.io/ios/topics/anso-pro) · [anso anesthesia](https://appshunter.io/ios/topics/anso-anesthesia) · [regional anesthesia](https://appshunter.io/ios/topics/regional-anesthesia) · [nerve block](https://appshunter.io/ios/topics/nerve-block) · [regional anesthesia reference](https://appshunter.io/ios/topics/regional-anesthesia-reference)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-04.*