# TenseBuilder vs Inference Ace

The clearest difference is price: Inference Ace at Free against TenseBuilder's $9.99. Inference Ace also leads on ratings volume (21 vs 2) and device support (3 vs 1). TenseBuilder's advantage is in-app purchases (none vs 3) and rating (4.0 vs 3.6). On review sentiment, update cadence and ads there is nothing between them.

Inference Ace is free to download; TenseBuilder costs $9.99 up front. Inference Ace sells 3 one-off in-app purchases. TenseBuilder asks for nothing beyond the download.

TenseBuilder holds the better App Store score, 4.0 against 3.6. That said, the two scores are not equally well evidenced: Inference Ace has 21 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 85% of TenseBuilder's written reviews are positive against 89% of Inference Ace's, so the app with the better star average is not the one people write more warmly about.

TenseBuilder ships an update every 6 months, Inference Ace every 7 months. The most recent releases landed on September 23, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | TenseBuilder | Inference Ace |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.0 (2 ratings)](https://appshunter.io/ios/app/tensebuilder/id427577382/reviews)** | [3.6 (21 ratings)](https://appshunter.io/ios/app/inference-ace/id866920724/reviews) |
| Number of ratings | 2 | **21** |
| Positive reviews | 85.0% of reviews | **88.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 7 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 466 MB | 22 MB |
| Requires iOS | **10.0** | 12.2 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mobile Education Store LLC](https://appshunter.io/developer/344378744) | [Janine Toole](https://appshunter.io/developer/839832427) |

## 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


### Inference Ace

[App page](https://appshunter.io/ios/app/inference-ace/id866920724)

This app helps children in grades 2-5 improve their reading comprehension by teaching inference skills step-by-step. It uses a game-like environment with over 450 examples and a reward center to keep kids engaged. Detailed reporting is available for up to 10 students.

**Highlights:** Step-by-step inference skill building, Game-like environment with reward center, Over 450 examples designed by teachers, Detailed reporting for multiple students, Incremental learning with unlocked levels, Guided learning for reduced frustration

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to 2 Players | $1.99 | one-time |
| Inference Ace: Buy All Levels | $2.99 | one-time |
| Upgrade to 10 Players | $2.99 | one-time |


## Frequently asked questions

### Is TenseBuilder free?

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

### Is Inference Ace free?

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

### Which has better reviews, TenseBuilder or Inference Ace?

TenseBuilder is rated higher. TenseBuilder averages 4.0 out of 5 from 2 ratings, while Inference Ace averages 3.6 from 21 ratings.

### Do TenseBuilder or Inference Ace have ads?

Neither TenseBuilder nor Inference Ace shows ads.

### Which is updated more often, TenseBuilder or Inference Ace?

TenseBuilder ships an update every 6 months, and Inference Ace every 7 months. Most recently, TenseBuilder was updated on September 23, 2026 and Inference Ace on October 3, 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.*