# FERS Calculator vs TSP Pro

The clearest difference is rating: TSP Pro at 4.8 against FERS Calculator's 3.7. TSP Pro also leads on update cadence (every 2 months vs every 6 months) and iOS requirement (15.6 vs 17.0). FERS Calculator's advantage is in-app purchases (none vs 2). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. TSP Pro sells 2 in-app purchases, starting at $2.99 per month. FERS Calculator asks for nothing beyond the download.

TSP Pro holds the better App Store score, 4.8 against 3.7. Both are backed by a comparable volume of ratings — 3 and 8 respectively.

FERS Calculator ships an update every 6 months, TSP Pro every 2 months. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | FERS Calculator | TSP Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/fers-calculator/id1484437870/reviews) | **[4.8 (8 ratings)](https://appshunter.io/ios/app/tsp-pro/id6744782326/reviews)** |
| Number of ratings | 3 | **8** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | **Free** | Freemium |
| Size | 0 MB | 26 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gabriel Ruliva](https://appshunter.io/developer/1484437869) | [Vikorus, LLC](https://appshunter.io/developer/1780116957) |

## What reviewers say

### FERS Calculator

[App page](https://appshunter.io/ios/app/fers-calculator/id1484437870)

Estimate your federal retirement annuity with this tool. It calculates your potential pension based on your age, years of service, and your highest three-year average salary. Get a ballpark figure for your FERS retirement.

**Highlights:** Estimate retirement annuity, Uses age, years of service, high-3 salary, Ballpark estimate, FERS specific calculation

**Features:** macOS Compatibility

**In-app purchases:** none


### TSP Pro

[App page](https://appshunter.io/ios/app/tsp-pro/id6744782326)

This app helps military personnel, government employees, and federal workers precisely track their Thrift Savings Plan (TSP) funds. It offers free retirement estimation tools, detailed fund performance monitoring, and powerful analysis features to optimize retirement planning.

**Highlights:** TSP fund price monitoring, Historical performance analytics, Contribution allocation tracking, Retirement projection calculations, Fund performance comparison, FERS Retirement Estimator, TSP Contribution Calculator

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TSP Pro Monthly | $2.99 | per month |
| TSP Pro Annual | $14.99 | per year |


## Frequently asked questions

### Is FERS Calculator free?

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

### Is TSP Pro free?

TSP Pro is free to download, with in-app purchases available.

### Which has better reviews, FERS Calculator or TSP Pro?

TSP Pro is rated higher. FERS Calculator averages 3.7 out of 5 from 3 ratings, while TSP Pro averages 4.8 from 8 ratings.

### Do FERS Calculator or TSP Pro have ads?

Neither FERS Calculator nor TSP Pro shows ads.

### Which is updated more often, FERS Calculator or TSP Pro?

FERS Calculator ships an update every 6 months, and TSP Pro every 2 months. Most recently, FERS Calculator was updated on October 15, 2026 and TSP Pro on October 24, 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.*