# SPECTRUM 2025 vs Refractive Foundations

The clearest difference is update cadence: Refractive Foundations at daily against SPECTRUM 2025's every 6 months. SPECTRUM 2025's advantage is iOS requirement (13.0 vs 16.6). 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.

SPECTRUM 2025 ships an update every 6 months, Refractive Foundations daily. The most recent releases landed on September 7, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | SPECTRUM 2025 | Refractive Foundations |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Daily** |
| Size | 49 MB | 19 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Sai Krishnan](https://appshunter.io/developer/756727006) | [Gurpal Virdi](https://appshunter.io/developer/1626671897) |

## What reviewers say

### SPECTRUM 2025

[App page](https://appshunter.io/ios/app/spectrum-2025/id6739062864)

**Features:** macOS Compatibility

**In-app purchases:** none


### Refractive Foundations

[App page](https://appshunter.io/ios/app/refractive-foundations/id6749237006)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SPECTRUM 2025 free?

SPECTRUM 2025 is free to download, with no in-app purchases.

### Is Refractive Foundations free?

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

### Do SPECTRUM 2025 or Refractive Foundations have ads?

Neither SPECTRUM 2025 nor Refractive Foundations shows ads.

### Which is updated more often, SPECTRUM 2025 or Refractive Foundations?

SPECTRUM 2025 ships an update every 6 months, and Refractive Foundations daily. Most recently, SPECTRUM 2025 was updated on September 7, 2026 and Refractive Foundations 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.*