# Backlog by Time Engine vs Bitslips

The clearest difference is in-app purchases: Backlog by Time Engine at none against Bitslips's 2. Bitslips's advantage is update cadence (weekly vs every 3 weeks) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Bitslips sells 2 in-app purchases, starting at $0.99 per month. Backlog by Time Engine asks for nothing beyond the download.

Backlog by Time Engine ships an update every 3 weeks, Bitslips weekly. The most recent releases landed on September 19, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Backlog by Time Engine | Bitslips |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Size | 3 MB | 1 MB |
| Requires iOS | **16.4** | 17.6 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [100-8 Studio](https://appshunter.io/developer/1436780503) | [Zozi Apps](https://appshunter.io/developer/511900083) |

## What reviewers say

### Backlog by Time Engine

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Bitslips

[App page](https://appshunter.io/ios/app/bitslips-fast-note-taking/id6745814227)

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version – Monthly | $0.99 | per month |
| Full Version – Yearly | $9.99 | per year |


## Frequently asked questions

### Is Backlog by Time Engine free?

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

### Is Bitslips free?

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

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

Neither Backlog by Time Engine nor Bitslips shows ads.

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

Backlog by Time Engine ships an update every 3 weeks, and Bitslips weekly. Most recently, Backlog by Time Engine was updated on September 19, 2026 and Bitslips on September 22, 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.*