# 腦珠算(加減法) 題目練習 vs OmniLens

The clearest difference is price: OmniLens at Free against 腦珠算(加減法) 題目練習's $4.99. OmniLens also leads on update cadence (weekly vs every 32 months). 腦珠算(加減法) 題目練習's advantage is in-app purchases (none vs 3) and device support (3 vs 1). On ads there is nothing between them.

OmniLens is free to download; 腦珠算(加減法) 題目練習 costs $4.99 up front. OmniLens sells 3 in-app purchases, starting at $3.99 per 7 days. 腦珠算(加減法) 題目練習 asks for nothing beyond the download.

腦珠算(加減法) 題目練習 ships an update every 32 months, OmniLens weekly. The most recent releases landed on September 21, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | 腦珠算(加減法) 題目練習 | OmniLens |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/id1419936734/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 32 months | **Weekly** |
| Monetization | Paid | — |
| Size | 9 MB | 25 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | +4 |
| Developer | [Hamster Force Multimedia Ltd.](https://appshunter.io/developer/443416476) | [鸽 李](https://appshunter.io/developer/1754752242) |

## What reviewers say

### 腦珠算(加減法) 題目練習

[App page](https://appshunter.io/ios/app/id1419936734)

This app offers a comprehensive abacus mental arithmetic training tool with six essential practice types. Users can create custom practice sessions, generate random questions and answers, and export them as PDFs for offline use. It tracks progress and provides analysis to help users focus on their weak areas.

**Highlights:** Six abacus mental arithmetic practice types, Customizable random question generation, PDF export for offline practice, Detailed progress tracking and analysis, Practice and Challenge modes, Test paper editor

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

**In-app purchases:** none


### OmniLens

[App page](https://appshunter.io/ios/app/omnilens-identify-anything/id6748526099)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.99 | per 7 days |
| Monthly | $7.99 | per month |
| Annual | $39.99 | per year |


## Frequently asked questions

### Is 腦珠算(加減法) 題目練習 free?

腦珠算(加減法) 題目練習 costs $4.99, with no in-app purchases.

### Is OmniLens free?

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

### Do 腦珠算(加減法) 題目練習 or OmniLens have ads?

Neither 腦珠算(加減法) 題目練習 nor OmniLens shows ads.

### Which is updated more often, 腦珠算(加減法) 題目練習 or OmniLens?

腦珠算(加減法) 題目練習 ships an update every 32 months, and OmniLens weekly. Most recently, 腦珠算(加減法) 題目練習 was updated on September 21, 2026 and OmniLens on September 16, 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.*