# Let's Sum It vs Number Sense Lite

The clearest difference is in-app purchases: Let's Sum It at none against Number Sense Lite's 1. Let's Sum It also leads on update cadence (every 3 months vs every 13 months) and iOS requirement (10.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. Number Sense Lite sells 1 one-off in-app purchase. Let's Sum It asks for nothing beyond the download.

Let's Sum It ships an update every 3 months, Number Sense Lite every 13 months. The most recent releases landed on October 9, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Let's Sum It | Number Sense Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/number-sense-lite/id1201814433/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 13 months |
| Monetization | — | Free with in-app purchases |
| Size | 37 MB | 207 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Classroom Focused Software](https://appshunter.io/developer/406741679) | [Attainment Company](https://appshunter.io/developer/403989333) |

## What reviewers say

### Let's Sum It

[App page](https://appshunter.io/ios/app/lets-sum-it/id1125545882)

**Features:** macOS Compatibility

**In-app purchases:** none


### Number Sense Lite

[App page](https://appshunter.io/ios/app/number-sense-lite/id1201814433)

This app helps develop foundational math skills for young learners. It offers engaging activities designed to improve number sense and align with educational standards for pre-K to 3rd grade. Data tracking helps monitor student progress.

**Highlights:** Number sense activities, Math skill assessment, Differentiated instruction, Universal design for learning, Progress data tracking, Customizable settings

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Version | $49.99 | one-time |


## Frequently asked questions

### Is Let's Sum It free?

Let's Sum It is free to download, with no in-app purchases.

### Is Number Sense Lite free?

Number Sense Lite is free to download, with in-app purchases available.

### Do Let's Sum It or Number Sense Lite have ads?

Neither Let's Sum It nor Number Sense Lite shows ads.

### Which is updated more often, Let's Sum It or Number Sense Lite?

Let's Sum It ships an update every 3 months, and Number Sense Lite every 13 months. Most recently, Let's Sum It was updated on October 9, 2026 and Number Sense Lite on October 12, 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.*