# Cause & Effect App vs Vesper AI

The clearest difference is in-app purchases: Cause & Effect App at none against Vesper AI's 11. Cause & Effect App also leads on iOS requirement (13.0 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Vesper AI sells 11 in-app purchases, starting at $8.99 per month. Cause & Effect App asks for nothing beyond the download.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Cause & Effect App | Vesper AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cause-and-effect-app/id1642735839/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | **Free** | Freemium |
| Size | 83 MB | 379 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [The Cause and Effect app LLC](https://appshunter.io/developer/1642735841) | [Vesper AI LTD](https://appshunter.io/developer/1648825414) |

## What reviewers say

### Cause & Effect App

[App page](https://appshunter.io/ios/app/cause-and-effect-app/id1642735839)

Empower children to build healthy habits and track their progress with a task-reward system. Assign chores, set custom goals, and let kids earn coins for prizes. Monitor growth with detailed reports.

**Highlights:** Task-reward system, Progress tracking, Customizable rewards, Coin redemption for prizes, Easy task management

**Features:** macOS Compatibility

**In-app purchases:** none


### Vesper AI

[App page](https://appshunter.io/ios/app/vesper-ai/id6444138264)

This AI coach provides accountability through personalized phone calls to help you reflect, plan, and stay on track with your goals. It tracks your progress and offers weekly insights to boost motivation.

**Highlights:** AI-powered phone check-ins, Goal setting and tracking, Personalized weekly insights, Progress visualization, Accountability partner, Customizable schedule

**Features:** macOS Compatibility

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Access | $8.99 | per month |
| Vesper Pro Monthly (20% Off) | $12.49 | per month |
| Vesper AI PRO Monthly | $15.99 | per month |
| Vesper Pro Annual (60% Off) | $59.99 | per year |
| Annual Onboarding Offer | $74.99 | per year |
| Pro Access | $79.99 | per year |
| Vesper Pro Annual (20% Off) | $119.99 | per year |
| Vesper AI PRO Annual | $149.99 | per year |
| 100 Star Boost | $2.99 | one-time |
| 500 Star Boost | $11.99 | one-time |
| 1000 Star Boost | $19.99 | one-time |


## Frequently asked questions

### Is Cause & Effect App free?

Cause & Effect App is free to download, with no in-app purchases.

### Is Vesper AI free?

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

### Do Cause & Effect App or Vesper AI have ads?

Neither Cause & Effect App nor Vesper AI shows ads.

### Which is updated more often, Cause & Effect App or Vesper AI?

Cause & Effect App ships an update fortnightly, and Vesper AI fortnightly. Most recently, Cause & Effect App was updated on October 27, 2026 and Vesper AI on October 24, 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.*