# DS検定対策アプリ vs CHEER TIMER

The clearest difference is review sentiment: CHEER TIMER at 100% against DS検定対策アプリ's 11%. CHEER TIMER also leads on price (Free vs $6.99) and update cadence (every 2 days vs every 5 months). DS検定対策アプリ's advantage is iOS requirement (11.0 vs 17.5). On ads, in-app purchases and device support there is nothing between them.

CHEER TIMER is free to download; DS検定対策アプリ costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

DS検定対策アプリ ships an update every 5 months, CHEER TIMER every 2 days. The most recent releases landed on September 30, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | DS検定対策アプリ | CHEER TIMER |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Positive reviews | 11.1% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 days** |
| Monetization | Paid | **Free** |
| Size | 76 MB | 13 MB |
| Requires iOS | **11.0** | 17.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SKILLUP NeXt, Ltd.](https://appshunter.io/developer/1569771970) | [NorthBridgeGroup](https://appshunter.io/developer/6799062507) |

## What reviewers say

### DS検定対策アプリ

[App page](https://appshunter.io/ios/app/ds/id1580662283)

This app provides comprehensive study materials and practice tests for the Data Scientist Certification (DS Exam) Literacy Level. It covers technical knowledge, business application, and societal context of data science, helping users identify strengths and weaknesses for effective preparation.

**Highlights:** DS検定対策, 理解度チェック, 学習データの可視化, スキマ時間学習, AI・データサイエンス情報

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

**In-app purchases:** none


### CHEER TIMER

[App page](https://appshunter.io/ios/app/cheer-timer/id6799062505)

This app offers a visual timer designed to aid focus and motivation for various activities like studying, work, or exercise. It provides an easy-to-understand display of time and delivers encouraging messages to keep users motivated. No account registration is needed to start using it.

**Highlights:** Visual time display, Encouraging messages, Supports study and work, Aids household tasks and exercise, No account registration required

**In-app purchases:** none


## Frequently asked questions

### Is DS検定対策アプリ free?

DS検定対策アプリ costs $6.99, with no in-app purchases.

### Is CHEER TIMER free?

CHEER TIMER is free to download, with no in-app purchases.

### Do DS検定対策アプリ or CHEER TIMER have ads?

Neither DS検定対策アプリ nor CHEER TIMER shows ads.

### Which is updated more often, DS検定対策アプリ or CHEER TIMER?

DS検定対策アプリ ships an update every 5 months, and CHEER TIMER every 2 days. Most recently, DS検定対策アプリ was updated on September 30, 2026 and CHEER TIMER on September 28, 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.*