# Digit Detective vs Reading Mountain

The clearest difference is in-app purchases: Reading Mountain at none against Digit Detective's 1. Reading Mountain also leads on update cadence (every 6 months vs every 39 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Digit Detective sells 1 one-off in-app purchase. Reading Mountain asks for nothing beyond the download.

Digit Detective ships an update every 39 months, Reading Mountain every 6 months. The most recent releases landed on October 19, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Digit Detective | Reading Mountain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/reading-mountain-basecamp/id6742805677/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 6 months** |
| Size | 26 MB | 40 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BrainTrain Inc.](https://appshunter.io/developer/584469134) | [LEARN MOUNTAIN LLC](https://appshunter.io/developer/1800083061) |

## What reviewers say

### Digit Detective

[App page](https://appshunter.io/ios/app/digit-detective-memory-train/id1211833573)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $2.99 | one-time |


### Reading Mountain

[App page](https://appshunter.io/ios/app/reading-mountain-basecamp/id6742805677)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Digit Detective free?

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

### Is Reading Mountain free?

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

### Do Digit Detective or Reading Mountain have ads?

Neither Digit Detective nor Reading Mountain shows ads.

### Which is updated more often, Digit Detective or Reading Mountain?

Digit Detective ships an update every 39 months, and Reading Mountain every 6 months. Most recently, Digit Detective was updated on October 19, 2026 and Reading Mountain on October 22, 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.*