# World History Documents vs TempVerter DB

The clearest difference is in-app purchases: TempVerter DB at none against World History Documents's 1. TempVerter DB also leads on review sentiment (100% vs 67%) and update cadence (every 6 weeks vs every 11 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. World History Documents sells 1 one-off in-app purchase. TempVerter DB asks for nothing beyond the download.

World History Documents ships an update every 11 months, TempVerter DB every 6 weeks. The most recent releases landed on October 8, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | World History Documents | TempVerter DB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (17 ratings)](https://appshunter.io/ios/app/tempverter-db/id1028872481/reviews)** |
| Number of ratings | — | **17** |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 109 MB | 24 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Michael Stebel](https://appshunter.io/developer/1027443988) |

## What reviewers say

### World History Documents

[App page](https://appshunter.io/ios/app/world-history-documents/id367927768)

Access a vast collection of 350 primary source documents and speeches spanning world history. Explore historical texts, including religious scriptures and famous addresses, with explanations of their significance. Save, email, and search documents easily.

**Highlights:** 350+ primary source documents, 19 audio/video recordings, Categorized by time period, Dedicated sections for regions/topics, Full text search functionality, Save to favorites, Email documents

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full World History | $1.99 | one-time |


### TempVerter DB

[App page](https://appshunter.io/ios/app/tempverter-db/id1028872481)

This app instantly converts temperatures between Celsius, Fahrenheit, and Kelvin as you type. It also includes a vast scientific database with over 225 important temperature references across various fields.

**Highlights:** Instant temperature conversion (C, F, K), Extensive scientific temperature database, 225+ reference temperatures, Covers astronomy, biology, chemistry, physics, and more, Temperatures provided in C, F, and K, Copy temperature values to clipboard

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

**In-app purchases:** none


## Frequently asked questions

### Is World History Documents free?

World History Documents is free to download, with in-app purchases available.

### Is TempVerter DB free?

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

### Do World History Documents or TempVerter DB have ads?

Neither World History Documents nor TempVerter DB shows ads.

### Which is updated more often, World History Documents or TempVerter DB?

World History Documents ships an update every 11 months, and TempVerter DB every 6 weeks. Most recently, World History Documents was updated on October 8, 2026 and TempVerter DB on September 28, 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.*