# eisonAI vs Dayvella

The clearest difference is in-app purchases: Dayvella at none against eisonAI's 1. eisonAI's advantage is update cadence (every 5 days vs every 4 months) and iOS requirement (18.0 vs 26.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. eisonAI sells 1 one-off in-app purchase. Dayvella asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for eisonAI against 5.0 for Dayvella. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

eisonAI ships an update every 5 days, Dayvella every 4 months. The most recent releases landed on October 27, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | eisonAI | Dayvella |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/eisonai/id6484502399/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/dayvella/id6753280745/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 4 months |
| Monetization | Paid | **Free** |
| Size | 29 MB | 14 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [伟才 黄](https://appshunter.io/developer/1313606730) | [峰 朱](https://appshunter.io/developer/1111654148) |

## What reviewers say

### eisonAI

[App page](https://appshunter.io/ios/app/eisonai/id6484502399)

This app helps you understand complex texts by revealing their underlying structure, not by summarizing. It highlights key decision points, assumptions, and argument turns, allowing for more deliberate and focused reading. Designed for long-form content, it works directly on web pages and documents, keeping your data private.

**Highlights:** Highlights decisions, assumptions, and argument turns, Works directly on web pages via Safari Extension, Handles long documents up to 15,000 tokens, On-device processing for privacy, CloudKit sync across Apple devices, Open source and auditable core components

**Features:** Safari Extension, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $14.99 | one-time |


### Dayvella

[App page](https://appshunter.io/ios/app/dayvella/id6753280745)

Easily create and track countdowns for important dates like birthdays, anniversaries, and personal goals. Personalize your countdowns with custom titles and emojis, and view upcoming events at a glance with a clean, intuitive design.

**Highlights:** Unlimited countdown creation, Personalize with emojis and titles, View upcoming events, Minimalist and intuitive design

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

**In-app purchases:** none


## Frequently asked questions

### Is eisonAI free?

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

### Is Dayvella free?

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

### Which has better reviews, eisonAI or Dayvella?

eisonAI and Dayvella are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do eisonAI or Dayvella have ads?

Neither eisonAI nor Dayvella shows ads.

### Which is updated more often, eisonAI or Dayvella?

eisonAI ships an update every 5 days, and Dayvella every 4 months. Most recently, eisonAI was updated on October 27, 2026 and Dayvella on October 17, 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.*