# NumFlow vs Circuit

NumFlow and Circuit are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. NumFlow sells 4 one-off in-app purchases and Circuit sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

NumFlow ships an update every 4 days, Circuit every 5 days. The most recent releases landed on October 9, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | NumFlow | Circuit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 4 days** | Every 5 days |
| Size | 8 MB | 101 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mustafa Ofluoglu](https://appshunter.io/developer/6794329369) | [Fatih Cankaya](https://appshunter.io/developer/6810751292) |

## What reviewers say

### NumFlow

[App page](https://appshunter.io/ios/app/numflow-number-puzzle/id6812376955)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 50 Hints | $4.99 | one-time |
| Remove Ads | $7.99 | one-time |
| 100 Hints | $8.99 | one-time |
| 300 Hints | $14.99 | one-time |


### Circuit

[App page](https://appshunter.io/ios/app/circuit-loop-puzzle/id6816641587)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is NumFlow free?

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

### Is Circuit free?

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

### Do NumFlow or Circuit have ads?

Both NumFlow and Circuit show ads.

### Which is updated more often, NumFlow or Circuit?

NumFlow ships an update every 4 days, and Circuit every 5 days. Most recently, NumFlow was updated on October 9, 2026 and Circuit on October 29, 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.*