# Solve SF vs purrify Smart pH Insight

The clearest difference is device support: purrify Smart pH Insight at 3 against Solve SF's 1. purrify Smart pH Insight also leads on iOS requirement (15.1 vs 17.6). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Solve SF ships an update every 3 days, purrify Smart pH Insight every 5 days. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Solve SF | purrify Smart pH Insight |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (67 ratings)](https://appshunter.io/ios/app/solve-sf/id6737751237/reviews)** | — |
| Number of ratings | **67** | — |
| Positive reviews | 78.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 days |
| Monetization | Free | — |
| Size | 179 MB | 22 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Woah Finally LLC](https://appshunter.io/developer/981317306) | [SPRINGDAWN PET SUPPLIES](https://appshunter.io/developer/1843289154) |

## What reviewers say

### Solve SF

[App page](https://appshunter.io/ios/app/solve-sf/id6737751237)

Easily report issues to the city of San Francisco. Submit requests for street cleaning, graffiti, illegal parking, and more by taking a photo. AI automatically analyzes and categorizes your reports for the 311 service.

**Highlights:** Report street cleaning issues, Submit graffiti reports, Log illegal parking, Report damaged public property, AI-powered report analysis, View submitted requests

**In-app purchases:** none


### purrify Smart pH Insight

[App page](https://appshunter.io/ios/app/purrify-smart-ph-insight/id6753275268)

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

**In-app purchases:** none


## Frequently asked questions

### Is Solve SF free?

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

### Is purrify Smart pH Insight free?

purrify Smart pH Insight is free to download, with no in-app purchases.

### Do Solve SF or purrify Smart pH Insight have ads?

Neither Solve SF nor purrify Smart pH Insight shows ads.

### Which is updated more often, Solve SF or purrify Smart pH Insight?

Solve SF ships an update every 3 days, and purrify Smart pH Insight every 5 days. Most recently, Solve SF was updated on November 4, 2026 and purrify Smart pH Insight on October 30, 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.*