# a vs Simple Sequence Diagram AI

The clearest difference is in-app purchases: a at none against Simple Sequence Diagram AI's 2. a also leads on chart position (#18 vs #200). Simple Sequence Diagram AI's advantage is update cadence (every 2 weeks vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Simple Sequence Diagram AI sells 2 in-app purchases, starting at $4.99 per month. a asks for nothing beyond the download.

a ships an update monthly, Simple Sequence Diagram AI every 2 weeks. The most recent releases landed on October 17, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | a | Simple Sequence Diagram AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (553 ratings)](https://appshunter.io/ios/app/a-shell/id1473805438/reviews)** | — |
| Number of ratings | **553** | — |
| Positive reviews | 78.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Paid | — |
| Best chart rank | **#18** | #200 |
| Size | 1.9 GB | 55 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Nicolas Holzschuch](https://appshunter.io/developer/1450994948) | [YUKI TANAIKE](https://appshunter.io/developer/478558546) |

## What reviewers say

### a

[App page](https://appshunter.io/ios/app/a-shell/id1473805438)

**Currently charting:** #18 Top Free · Developer Tools (US App Store)

Run a full Unix-like terminal environment on your iOS device. Execute a wide range of commands, edit files, and even program using included interpreters and compilers. Supports multitasking and integration with Shortcuts.

**Highlights:** Local Unix terminal emulator, SSH client, File transfer (scp, curl), Text editing (vim, ed), Scripting languages (Python, Lua, Perl, JS), C/C++ compiler, TeX distribution

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Powerful terminal with Linux commands
- 👍 Useful for programming and development
- 🔒 Secure and reliable
- 💡 Impressive capabilities for an iOS app
- 👍 Helpful documentation and developer support

**What reviewers complain about**

- 🐛 Occasional crashes and bugs
- 🔍 Limited customization options
- 🔍 Missing some basic terminal features
- 🔍 Compatibility issues with certain packages

**Reported bugs**

- Toolbar buttons not accessible in portrait mode on some devices
- Pasting from clipboard can insert unexpected characters
- Sourcing certain script files causes crashes

**Requested features**

- Add support for package managers like Homebrew or APT
- Implement more advanced shell features like job control and better tab completion
- Integrate Git for version control
- Allow installing additional packages and libraries
- Improve clipboard and file management integration


### Simple Sequence Diagram AI

[App page](https://appshunter.io/ios/app/simple-sequence-diagram-ai/id6711357061)

**Currently charting:** #200 Top Grossing · Developer Tools (US App Store)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Simple Sequence Flow Pro (Monthly) | $4.99 | per month |
| Simple Sequence Flow Pro (Annual) | $44.99 | per year |


## Frequently asked questions

### Is a free?

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

### Is Simple Sequence Diagram AI free?

Simple Sequence Diagram AI is free to download, with in-app purchases available.

### Do a or Simple Sequence Diagram AI have ads?

Neither a nor Simple Sequence Diagram AI shows ads.

### Which is updated more often, a or Simple Sequence Diagram AI?

a ships an update monthly, and Simple Sequence Diagram AI every 2 weeks. Most recently, a was updated on October 17, 2026 and Simple Sequence Diagram AI on October 12, 2026.

### Which is more popular, a or Simple Sequence Diagram AI?

a currently peaks at #18 in the App Store charts, and Simple Sequence Diagram AI at #200. Chart position reflects recent download velocity rather than total install base.

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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.*