# Smart Flow vs sigmaABC

The clearest difference is update cadence: sigmaABC at fortnightly against Smart Flow's every 2 months. Smart Flow's advantage is iOS requirement (13.0 vs 15.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Smart Flow ships an update every 2 months, sigmaABC fortnightly. The most recent releases landed on September 17, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | Smart Flow | sigmaABC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 32 MB | 76 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Engineering Do Brasil SA](https://appshunter.io/developer/1511789090) | [Fundação ABC](https://appshunter.io/developer/1253447077) |

## What reviewers say

### Smart Flow

[App page](https://appshunter.io/ios/app/smart-flow/id1516387020)

**Features:** macOS Compatibility

**In-app purchases:** none


### sigmaABC

[App page](https://appshunter.io/ios/app/sigmaabc/id6748761818)

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

**In-app purchases:** none


## Frequently asked questions

### Is Smart Flow free?

Smart Flow is free to download, with no in-app purchases.

### Is sigmaABC free?

sigmaABC is free to download, with no in-app purchases.

### Do Smart Flow or sigmaABC have ads?

Neither Smart Flow nor sigmaABC shows ads.

### Which is updated more often, Smart Flow or sigmaABC?

Smart Flow ships an update every 2 months, and sigmaABC fortnightly. Most recently, Smart Flow was updated on September 17, 2026 and sigmaABC on September 5, 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.*