# TDK vs X

The clearest difference is in-app purchases: TDK at none against X's 1. TDK also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 3, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | TDK | X |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/tdk-lambda/id1487966383/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 14 MB | 16 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TDK-Lambda Americas Inc.](https://appshunter.io/developer/1487966382) | [Tiyan B.V.](https://appshunter.io/developer/1854429474) |

## What reviewers say

### TDK

[App page](https://appshunter.io/ios/app/tdk-lambda/id1487966383)

Access TDK-Lambda's complete product catalog offline. Browse by category, industry, or search for specific part numbers. This guide puts essential product information at your fingertips.

**Highlights:** Offline product catalog access, Browse by category, Browse by industry, Search by part number, Comprehensive product list

**In-app purchases:** none


### X

[App page](https://appshunter.io/ios/app/x-pense/id6755694529)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Export Expense Claims | $14.99 | one-time |


## Frequently asked questions

### Is TDK free?

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

### Is X free?

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

### Do TDK or X have ads?

Neither TDK nor X shows ads.

### Which is updated more often, TDK or X?

TDK ships an update every 2 months, and X every 2 months. Most recently, TDK was updated on November 3, 2026 and X on September 30, 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.*