# Kodex vs Tersa

The clearest difference is review sentiment: Tersa at 100% against Kodex's 63%. Tersa also leads on in-app purchases (none vs 1) and update cadence (every 2 weeks vs monthly). Kodex's advantage is chart position (#69 vs unranked). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Kodex sells 1 one-off in-app purchase. Tersa asks for nothing beyond the download.

Kodex ships an update monthly, Tersa every 2 weeks. The most recent releases landed on October 22, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Kodex | Tersa |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (208 ratings)](https://appshunter.io/ios/app/kodex/id1038574481/reviews)** | — |
| Number of ratings | **208** | — |
| Positive reviews | 63.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#69** | — |
| Size | 14 MB | 122 MB |
| Requires iOS | 13.4 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bruno Philipe Resende Silva](https://appshunter.io/developer/605892017) | [Denis Kosov](https://appshunter.io/developer/1563252853) |

## What reviewers say

### Kodex

[App page](https://appshunter.io/ios/app/kodex/id1038574481)

**Currently charting:** #69 Top Free · Developer Tools (US App Store)

An advanced code editor for iOS devices, offering desktop-class features like multi-caret editing, regex search, and syntax highlighting for over 150 languages. It integrates with the Files app and supports external keyboards for a seamless coding experience.

**Highlights:** Multi-caret editing, Regex search and replace, Minimap for navigation, Syntax highlighting (150+ languages), External keyboard support, Files app integration, Customizable themes and fonts

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip | $4.99 | one-time |

**What reviewers like**

- 🚀 Powerful code editor
- 👍 Well-integrated with iPad features
- 🎨 Excellent syntax highlighting and theming
- 📁 Broad file format support
- 💡 Useful QuickEdit mode

**What reviewers complain about**

- 🐛 Frequent crashes and stability issues
- 🔍 Lack of search and replace functionality
- 🔀 Difficulty navigating between files
- 🚫 No option to run/compile code
- 📏 Forced word wrapping with no toggle

**Reported bugs**

- Crashes when opening certain file types
- Loses data after copy/paste and undo/redo
- Compatibility issues with latest iOS versions
- Overlapping UI elements in search/replace

**Requested features**

- Add search and replace feature
- Implement code execution/compilation
- Improve file management and navigation
- Provide option to disable word wrapping
- Introduce more keyboard shortcuts


### Tersa

[App page](https://appshunter.io/ios/app/tersa-circuit-simulator/id6805903884)

Design and analyze analog, digital, and RF circuits directly on your iPhone or iPad. Explore circuit behavior with various simulations and visualize results on clear plots. Supports SPICE model import and local project exploration.

**Highlights:** Schematic building, DC operating point analysis, AC and transient analyses, S-parameter analysis, Smith chart visualization, SPICE model import, Local simulation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kodex free?

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

### Is Tersa free?

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

### Do Kodex or Tersa have ads?

Neither Kodex nor Tersa shows ads.

### Which is updated more often, Kodex or Tersa?

Kodex ships an update monthly, and Tersa every 2 weeks. Most recently, Kodex was updated on October 22, 2026 and Tersa on October 18, 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.*