# Allowance Calculator vs SolarZero

The clearest difference is in-app purchases: SolarZero at none against Allowance Calculator's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Allowance Calculator sells 1 in-app purchase, starting at $3.99 per year. SolarZero asks for nothing beyond the download.

Allowance Calculator ships an update every 2 months, SolarZero monthly. The most recent releases landed on September 11, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Allowance Calculator | SolarZero |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 35.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | — | Free |
| Size | 2 MB | 22 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jackson Crawford](https://appshunter.io/developer/1689354649) | [solarZero Limited](https://appshunter.io/developer/1283894275) |

## What reviewers say

### Allowance Calculator

[App page](https://appshunter.io/ios/app/allowance-calculator/id6449482486)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $3.99 | per year |


### SolarZero

[App page](https://appshunter.io/ios/app/solarzero/id6504657190)

Monitor and optimize your home's solar energy system with real-time data on energy generation and usage. Track carbon savings, access energy-saving modes, and refer friends to the service.

**Highlights:** Real-time energy generation and usage data, Energy import/export status updates, Carbon savings and footprint tracking, Hot water energy saving mode, Refer-a-Friend program

**In-app purchases:** none


## Frequently asked questions

### Is Allowance Calculator free?

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

### Is SolarZero free?

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

### Do Allowance Calculator or SolarZero have ads?

Neither Allowance Calculator nor SolarZero shows ads.

### Which is updated more often, Allowance Calculator or SolarZero?

Allowance Calculator ships an update every 2 months, and SolarZero monthly. Most recently, Allowance Calculator was updated on September 11, 2026 and SolarZero on September 8, 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.*