# eFlow vs SliceRoll

The clearest difference is in-app purchases: eFlow at none against SliceRoll's 1. eFlow also leads on iOS requirement (11 vs 13.0). SliceRoll's advantage is update cadence (weekly vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. SliceRoll sells 1 one-off in-app purchase. eFlow asks for nothing beyond the download.

eFlow ships an update every 3 weeks, SliceRoll weekly. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | eFlow | SliceRoll |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/eflow/id1434703366/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 3 MB | 8 MB |
| Requires iOS | **11** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Savant Electronics Inc.](https://appshunter.io/developer/1288418213) | [雪 赵](https://appshunter.io/developer/1543725241) |

## What reviewers say

### eFlow

[App page](https://appshunter.io/ios/app/eflow/id1434703366)

Monitor the capacity of your water filters using a Bluetooth flow meter. Track multiple filters simultaneously to ensure optimal performance and timely replacements.

**Highlights:** Read water filter capacity via Bluetooth, Connect to Bluetooth flow meter, Monitor multiple water filters, Track filter performance

**Features:** macOS Compatibility

**In-app purchases:** none


### SliceRoll

[App page](https://appshunter.io/ios/app/sliceroll/id1543733603)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NO watermark, all ratios. | $0.99 | one-time |


## Frequently asked questions

### Is eFlow free?

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

### Is SliceRoll free?

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

### Do eFlow or SliceRoll have ads?

Neither eFlow nor SliceRoll shows ads.

### Which is updated more often, eFlow or SliceRoll?

eFlow ships an update every 3 weeks, and SliceRoll weekly. Most recently, eFlow was updated on October 2, 2026 and SliceRoll on October 9, 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.*