Standard Deviation Calculator vs File Guard Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Standard Deviation Calculator
Calculate statistical measures like standard deviation, mean, variance, and median for a dataset. It also offers population deviation and the ability to compute z-scores based on your input data.
- Calculate standard deviation
- Calculate mean (average)
- Calculate variance
- Calculate population deviation
- Calculate median
- Calculate Q1 & Q3
- Calculate z-score
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Use this app to calculate the standard deviation of a set of values. It will also return the: -mean(average) -variance -population deviation -Median -Q1 & Q3 To add a value to the set press "+Row". When all data are in press "Calculate". Note: Population deviation (n-1) is unbiased, while normal standard deviation (n) is biased. To calulate the z-score enter a number into the z-score tab, then click find z-score. The z-score will be based off the main table.
File Guard Pro
Securely encrypt and decrypt your files with this powerful cryptography tool. It offers a user-friendly interface for protecting confidential information quickly and efficiently. Based on a customized, reliable algorithm, it provides stronger security than many public tools.
- File encryption
- File decryption
- Customized cryptography algorithm
- User-friendly interface
- Fast performance
- Confidential information security
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This is the iOS version of File Encryptor Pro, the app is a small general purpose cryptography tool that can be used to encrypt and decrypt files. The app was based on a customised stable and reliable cryptography algorithm, that guarantees it more stronger than well-known public cryptography algorithm based tools, and helps user ensure confidential informations is secure, easy to use and fast. Only requires several taps in daily usage scenarios.
Screenshots
Verdict
The clearest difference is rating: File Guard Pro at 4.5 against Standard Deviation Calculator's 2.4. File Guard Pro also leads on in-app purchases (none vs 1). Standard Deviation Calculator's advantage is ratings volume (24 vs 2) and iOS requirement (6.1 vs 15.6). On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Standard Deviation Calculator sells 1 one-off in-app purchase. File Guard Pro asks for nothing beyond the download.
File Guard Pro holds the better App Store score, 4.5 against 2.4. That said, the two scores are not equally well evidenced: Standard Deviation Calculator has 24 ratings behind it against 2, so its average is the more settled of the two.
Standard Deviation Calculator ships an update every 5 weeks, File Guard Pro every 2 months. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.
| Parameter | Standard Deviation Calculator | File Guard Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (24 ratings) | 4.5 (2 ratings) — better |
| Positive reviews | 20.0% of reviews | — |
| Number of ratings | 24 — better | 2 |
| Update frequency | Every 5 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 6.1 — better | 15.6 |
| Further details — not scored | ||
| Size | 2 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Keely Hill | 斌 虞 |
Customer experience
Standard Deviation Calculator
File Guard Pro
In-app purchases
Standard Deviation Calculator
- More ResultsFree
File Guard Pro
No in-app purchases
Questions
Is Standard Deviation Calculator free?
Is File Guard Pro free?
Which has better reviews, Standard Deviation Calculator or File Guard Pro?
Do Standard Deviation Calculator or File Guard Pro have ads?
Which is updated more often, Standard Deviation Calculator or File Guard Pro?
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