# TowerOfLondon vs AnSo

The clearest difference is price: AnSo at Free against TowerOfLondon's $9.99. AnSo also leads on update cadence (fortnightly vs every 38 months) and chart position (#116 vs unranked). TowerOfLondon's advantage is in-app purchases (none vs 4). On ads and device support there is nothing between them.

AnSo is free to download; TowerOfLondon costs $9.99 up front. AnSo sells 4 in-app purchases, starting at $0.49 per month. TowerOfLondon asks for nothing beyond the download.

TowerOfLondon ships an update every 38 months, AnSo fortnightly. Both last shipped on November 7, 2026.

## The numbers

| Metric | TowerOfLondon | AnSo |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | — | **[3.6 (32 ratings)](https://appshunter.io/ios/app/anso/id1627451047/reviews)** |
| Number of ratings | — | **32** |
| Positive reviews | — | 40.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 38 months | **Fortnightly** |
| Monetization | — | Subscription |
| Best chart rank | — | **#116** |
| Size | 5 MB | 72 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [CereScape Pty Ltd](https://appshunter.io/developer/722047803) | [Sumo Enterprises Pty Ltd](https://appshunter.io/developer/1202779263) |

## What reviewers say

### TowerOfLondon

[App page](https://appshunter.io/ios/app/toweroflondon/id1547745832)

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

**In-app purchases:** none


### AnSo

[App page](https://appshunter.io/ios/app/anso/id1627451047)

**Currently charting:** #116 Top Grossing · Medical (US App Store)

This app helps anesthesiologists quickly identify sonoanatomy for various procedures. It offers detailed images, landmark sketches, and innervation data for nerve blocks, along with tips from experienced clinicians. It covers regional anesthesia and other perioperative ultrasound uses.

**Highlights:** Sonoanatomy identification, Landmark sketches, Nerve block innervation, Ergonomic positioning guides, Perioperative ultrasound uses, Clinical tips and notes

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AnSo one month subscription | $0.49 | per month |
| AnSo Pro one year subscription | $5.99 | per year |
| AnSo Pro subscription | $5.99 | per year |
| AnSo one year subscription | $5.99 | per year |


## Frequently asked questions

### Is TowerOfLondon free?

TowerOfLondon costs $9.99, with no in-app purchases.

### Is AnSo free?

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

### Do TowerOfLondon or AnSo have ads?

Neither TowerOfLondon nor AnSo shows ads.

### Which is updated more often, TowerOfLondon or AnSo?

TowerOfLondon ships an update every 38 months, and AnSo fortnightly. Most recently, TowerOfLondon was updated on November 7, 2026 and AnSo on November 7, 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.*