# Backlog by Time Engine vs Horizon AI

The clearest difference is in-app purchases: Backlog by Time Engine at none against Horizon AI's 5. Backlog by Time Engine also leads on iOS requirement (16.4 vs 26.4). Horizon AI's advantage is update cadence (daily vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Horizon AI sells 5 in-app purchases, starting at $4.99 per month. Backlog by Time Engine asks for nothing beyond the download.

Backlog by Time Engine ships an update every 3 weeks, Horizon AI daily. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Backlog by Time Engine | Horizon AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/horizon-ai-goal-planner/id6774206966/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 4 MB |
| Requires iOS | **16.4** | 26.4 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [100-8 Studio](https://appshunter.io/developer/1436780503) | [Denis Mandraburca](https://appshunter.io/developer/1895862548) |

## What reviewers say

### Backlog by Time Engine

[App page](https://appshunter.io/ios/app/backlog-by-time-engine/id6470202026)

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

**In-app purchases:** none


### Horizon AI

[App page](https://appshunter.io/ios/app/horizon-ai-goal-planner/id6774206966)

This app helps you achieve any goal by generating a personalized, date-stamped action plan. It breaks down your objectives into manageable tasks and offers AI coaching for support. Syncs across devices and exports to your calendar.

**Highlights:** AI roadmap generation, Milestone and task tracking, AI per-task coaching, Calendar export, Home screen widget, iCloud sync

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Horizon AI Pro | $4.99 | per month |
| 80 Credits | $0.99 | one-time |
| 200 Credits | $2.99 | one-time |
| 500 Credits | $5.99 | one-time |
| 1100 Credits | $9.99 | one-time |


## Frequently asked questions

### Is Backlog by Time Engine free?

Backlog by Time Engine is free to download, with no in-app purchases.

### Is Horizon AI free?

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

### Do Backlog by Time Engine or Horizon AI have ads?

Neither Backlog by Time Engine nor Horizon AI shows ads.

### Which is updated more often, Backlog by Time Engine or Horizon AI?

Backlog by Time Engine ships an update every 3 weeks, and Horizon AI daily. Most recently, Backlog by Time Engine was updated on November 3, 2026 and Horizon AI on October 31, 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.*