# Infidelity ER vs SolidMaint

The clearest difference is in-app purchases: SolidMaint at none against Infidelity ER's 1. SolidMaint also leads on update cadence (weekly vs every 2 months). Infidelity ER's advantage is iOS requirement (12.0 vs 16.4). On price, ads and device support there is nothing between them.

Both are free to download. Infidelity ER sells 1 in-app purchase, starting at $7.99 per month. SolidMaint asks for nothing beyond the download.

Infidelity ER ships an update every 2 months, SolidMaint weekly. The most recent releases landed on September 29, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Infidelity ER | SolidMaint |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 39 MB | 81 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Relationskonsulten Stockholm AB](https://appshunter.io/developer/1486595564) | [SolidMaint S.L.](https://appshunter.io/developer/6772147836) |

## What reviewers say

### Infidelity ER

[App page](https://appshunter.io/ios/app/infidelity-er/id1486595565)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ER Infidelity subscription | $7.99 | per month |


### SolidMaint

[App page](https://appshunter.io/ios/app/solidmaint/id6772147834)

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

**In-app purchases:** none


## Frequently asked questions

### Is Infidelity ER free?

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

### Is SolidMaint free?

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

### Do Infidelity ER or SolidMaint have ads?

Neither Infidelity ER nor SolidMaint shows ads.

### Which is updated more often, Infidelity ER or SolidMaint?

Infidelity ER ships an update every 2 months, and SolidMaint weekly. Most recently, Infidelity ER was updated on September 29, 2026 and SolidMaint on October 7, 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.*