# Time Stamp Pro vs CertLei Verifier

The clearest difference is in-app purchases: CertLei Verifier at none against Time Stamp Pro's 1. CertLei Verifier also leads on update cadence (every 9 days vs every 12 months) and iOS requirement (15.6 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Time Stamp Pro sells 1 one-off in-app purchase. CertLei Verifier asks for nothing beyond the download.

Time Stamp Pro ships an update every 12 months, CertLei Verifier every 9 days. The most recent releases landed on September 20, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Time Stamp Pro | CertLei Verifier |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 1 MB | 29 MB |
| Requires iOS | 26.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Saman Razavi](https://appshunter.io/developer/457169006) | [Certizen Technology Limited](https://appshunter.io/developer/1564645035) |

## What reviewers say

### Time Stamp Pro

[App page](https://appshunter.io/ios/app/time-stamp-pro/id1007281016)

This utility app helps you meticulously track time spent on various projects and clients. It offers location-based reminders to ensure timers are started and stopped accurately, with secure iCloud backup for your data.

**Highlights:** Log time spent on projects, Create customer profiles, Generate easy-to-read reports, Location-based timer reminders, Unlimited project modification, iCloud data backup and restore

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro-Version | $4.99 | one-time |


### CertLei Verifier

[App page](https://appshunter.io/ios/app/certlei-verifier/id6761257520)

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

**In-app purchases:** none


## Frequently asked questions

### Is Time Stamp Pro free?

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

### Is CertLei Verifier free?

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

### Do Time Stamp Pro or CertLei Verifier have ads?

Neither Time Stamp Pro nor CertLei Verifier shows ads.

### Which is updated more often, Time Stamp Pro or CertLei Verifier?

Time Stamp Pro ships an update every 12 months, and CertLei Verifier every 9 days. Most recently, Time Stamp Pro was updated on September 20, 2026 and CertLei Verifier on September 26, 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.*