# Backlog by Time Engine vs DooNuts

The clearest difference is in-app purchases: Backlog by Time Engine at none against DooNuts's 3. DooNuts's advantage is update cadence (every 4 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. DooNuts sells 3 in-app purchases, starting at $1.99 per month. Backlog by Time Engine asks for nothing beyond the download.

Backlog by Time Engine ships an update every 3 weeks, DooNuts every 4 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Backlog by Time Engine | DooNuts |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 3 MB | 88 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [100-8 Studio](https://appshunter.io/developer/1436780503) | [Julian Laping](https://appshunter.io/developer/1204343879) |

## 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


### DooNuts

[App page](https://appshunter.io/ios/app/doonuts-cozy-todos/id6812897231)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DooNuts Pro (Month) | $1.99 | per month |
| DooNuts Pro (Year) | $14.99 | per year |
| DooNuts Pro (Forever) | $29.99 | 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 DooNuts free?

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

### Do Backlog by Time Engine or DooNuts have ads?

Neither Backlog by Time Engine nor DooNuts shows ads.

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

Backlog by Time Engine ships an update every 3 weeks, and DooNuts every 4 days. Most recently, Backlog by Time Engine was updated on October 31, 2026 and DooNuts 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.*