# Systems vs Time Flies By

The clearest difference is update cadence: Time Flies By at weekly against Systems's every 4 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Systems sells 4 in-app purchases, starting at $3.99 per 7 days and Time Flies By sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Systems ships an update every 4 weeks, Time Flies By weekly. Both last shipped on October 28, 2026.

## The numbers

| Metric | Systems | Time Flies By |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/time-flies-by/id6756827059/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Weekly** |
| Monetization | — | Freemium |
| Size | 70 MB | 4 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Adam Kovacs](https://appshunter.io/developer/1814096456) | [Kai Luo](https://appshunter.io/developer/344176636) |

## What reviewers say

### Systems

[App page](https://appshunter.io/ios/app/systems-checklists/id6746172413)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Systems Pro Weekly | $3.99 | per 7 days |
| Systems Pro (1 Month) | $4.99 | per month |
| Systems Pro (1 Year) | $19.99 | per year |
| Systems Pro (Lifetime) | $49.99 | one-time |


### Time Flies By

[App page](https://appshunter.io/ios/app/time-flies-by/id6756827059)

Understand how you spend your time with a count-up tracker that runs multiple events simultaneously. Analyze your weekly habits with detailed breakdowns and spot trends over time. Stay focused with anti-sleep mode and access live updates via Dynamic Island.

**Highlights:** Simultaneous count-up time tracking, Tagging for context, Weekly analytics and trend comparison, Live Activity and Dynamic Island integration, iCloud sync across devices, Anti-sleep mode for focus

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $0.99 | per month |
| Premium Yearly | $4.99 | per year |
| Premium Lifetime | $14.99 | one-time |


## Frequently asked questions

### Is Systems free?

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

### Is Time Flies By free?

Time Flies By is free to download, with in-app purchases available.

### Do Systems or Time Flies By have ads?

Neither Systems nor Time Flies By shows ads.

### Which is updated more often, Systems or Time Flies By?

Systems ships an update every 4 weeks, and Time Flies By weekly. Most recently, Systems was updated on October 28, 2026 and Time Flies By on October 28, 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.*