# TimeTree HD vs Interactive Life Cycles

The clearest difference is price: TimeTree HD at Free against Interactive Life Cycles's $1.99. TimeTree HD also leads on iOS requirement (8.0 vs 12.0). Interactive Life Cycles's advantage is rating (5.0 vs 1.0). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

TimeTree HD is free to download; Interactive Life Cycles costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Interactive Life Cycles holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

TimeTree HD ships an update every 23 months, Interactive Life Cycles every 21 months. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | TimeTree HD | Interactive Life Cycles |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/timetree-hd/id468820058/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/interactive-life-cycles/id1282036358/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 23 months | **Every 21 months** |
| Monetization | **Free** | Paid |
| Size | 66 MB | 186 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPad | **iPad, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [Arizona and Penn State Universities](https://appshunter.io/developer/372842503) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## What reviewers say

### TimeTree HD

[App page](https://appshunter.io/ios/app/timetree-hd/id468820058)

Explore the evolutionary timescale of life with this app. It provides a public knowledge base of divergence times among thousands of organisms, drawing from scientific literature. Easily search for comparisons between species and view summary statistics.

**Highlights:** Explore evolutionary timescale, Thousands of divergence times, Tree-based hierarchical system, Search for organism comparisons, Compute summary statistics, Data from 2,274 studies

**Features:** macOS Compatibility

**In-app purchases:** none


### Interactive Life Cycles

[App page](https://appshunter.io/ios/app/interactive-life-cycles/id1282036358)

Explore detailed animal and plant life cycles through interactive illustrations and descriptions. This app offers quizzes and word games to test comprehension, making it an engaging educational tool for students and teachers.

**Highlights:** Interactive life cycle exploration, Detailed illustrations and descriptions, Quizzes for comprehension, Word games for review, Information on biological processes, Charts for special views

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TimeTree HD free?

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

### Is Interactive Life Cycles free?

Interactive Life Cycles costs $1.99, with no in-app purchases.

### Which has better reviews, TimeTree HD or Interactive Life Cycles?

Interactive Life Cycles is rated higher. TimeTree HD averages 1.0 out of 5 from 1 ratings, while Interactive Life Cycles averages 5.0 from 1 ratings.

### Do TimeTree HD or Interactive Life Cycles have ads?

Neither TimeTree HD nor Interactive Life Cycles shows ads.

### Which is updated more often, TimeTree HD or Interactive Life Cycles?

TimeTree HD ships an update every 23 months, and Interactive Life Cycles every 21 months. Most recently, TimeTree HD was updated on October 7, 2026 and Interactive Life Cycles on October 5, 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.*