# Invisor 401k vs Keep the Diff

The clearest difference is in-app purchases: Invisor 401k at none against Keep the Diff's 2. Keep the Diff's advantage is update cadence (every 6 days vs monthly) and device support (4 vs 2). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Keep the Diff sells 2 in-app purchases, starting at $4.99 per month. Invisor 401k asks for nothing beyond the download.

Invisor 401k ships an update monthly, Keep the Diff every 6 days. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Invisor 401k | Keep the Diff |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/invisor-401k/id6736998752/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 6 days** |
| Monetization | Free | — |
| Size | 34 MB | 13 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Schwab Retirement Technologies Inc.](https://appshunter.io/developer/1558174243) | [Augustus Travels LLC](https://appshunter.io/developer/1583073613) |

## What reviewers say

### Invisor 401k

[App page](https://appshunter.io/ios/app/invisor-401k/id6736998752)

Manage your retirement savings on the go. Enroll in your plan, forecast income, monitor investments, and adjust contributions. Access financial learning resources and manage account settings securely.

**Highlights:** Retirement plan enrollment, Income forecast, Investment monitoring, Contribution adjustments, Financial learning center, Secure document upload, Biometric login

**Features:** Vision Pro support

**In-app purchases:** none


### Keep the Diff

[App page](https://appshunter.io/ios/app/keep-the-diff-save-money/id6802051358)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $4.99 | per month |
| Premium Annual | $39.99 | per year |


## Frequently asked questions

### Is Invisor 401k free?

Invisor 401k is free to download, with no in-app purchases.

### Is Keep the Diff free?

Keep the Diff is free to download, with in-app purchases available.

### Do Invisor 401k or Keep the Diff have ads?

Neither Invisor 401k nor Keep the Diff shows ads.

### Which is updated more often, Invisor 401k or Keep the Diff?

Invisor 401k ships an update monthly, and Keep the Diff every 6 days. Most recently, Invisor 401k was updated on October 16, 2026 and Keep the Diff on October 14, 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.*