# TenseBuilder vs Digit Detective

The clearest difference is price: Digit Detective at Free against TenseBuilder's $9.99. Digit Detective also leads on device support (3 vs 1). TenseBuilder's advantage is in-app purchases (none vs 1) and update cadence (every 6 months vs every 39 months). On ads there is nothing between them.

Digit Detective is free to download; TenseBuilder costs $9.99 up front. Digit Detective sells 1 one-off in-app purchase. TenseBuilder asks for nothing beyond the download.

TenseBuilder ships an update every 6 months, Digit Detective every 39 months. The most recent releases landed on June 5, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | TenseBuilder | Digit Detective |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.0 (2 ratings)](https://appshunter.io/ios/app/tensebuilder/id427577382/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 85.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 39 months |
| Monetization | Paid | — |
| Size | 466 MB | 26 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mobile Education Store LLC](https://appshunter.io/developer/344378744) | [BrainTrain Inc.](https://appshunter.io/developer/584469134) |

## What reviewers say

### TenseBuilder

[App page](https://appshunter.io/ios/app/tensebuilder/id427577382)

This app uses animated videos to teach students how to identify and use correct past, present, and future verb tenses. It includes interactive exercises and a recording feature to help improve language skills.

**Highlights:** Animated video lessons, Demonstrates past, present, future tense, Focus on irregular past tense verbs, Interactive sentence completion, Voice recording for practice, Drag and drop sentence building

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is TenseBuilder free?

TenseBuilder costs $9.99, with no in-app purchases.

### Is Digit Detective free?

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

### Do TenseBuilder or Digit Detective have ads?

Neither TenseBuilder nor Digit Detective shows ads.

### Which is updated more often, TenseBuilder or Digit Detective?

TenseBuilder ships an update every 6 months, and Digit Detective every 39 months. Most recently, TenseBuilder was updated on June 5, 2026 and Digit Detective on September 15, 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.*