Periodic Table PRO vs XLocker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Periodic Table PRO
Explore a virtual chemistry lab with interactive experiments and detailed information on all chemical elements. Features include atom structure simulations, downloadable PDFs, and studying analytics to enhance learning. Supports multiple languages and offers a cohesive, functional design.
- Virtual chemistry lab with experiments
- Detailed chemical element information
- Atom structure simulations
- Downloadable element PDFs
- Studying analytics
- Multi-language support
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Periodic Table PRO is a multiple-awarded and certified app that provides the following: 01. A virtual laboratory with cool chemistry experiments 02. Concise information for all chemical elements 03. Multi-language support 04. In memoriam Chernobyl 05. Hidden app secrets (easter eggs) 06. Studying analytics 07. Quick search & in-place information filtering 08. Downloadable PDFs for each chemical element 09. Presentation galleries & movie-clips 10. Atom structure simulations 11. Cohesive design focused on functionality 12. Controls for haptic feedback, sounds & visual effects The app complies with IUPAC's (International Union of Pure and Applied Chemistry) latest standardization and is used in more than 148 countries worldwide. Love the app? Rate us! We update the app regularly so we can make it better for you. If you have feedback & questions please visit our website: https://app.periodic-table.pro Periodic Table PRO - The chemistry lab in your pocket.
XLocker
Manage device usage with flexible screen time controls. Block specific apps, set schedules for study or leisure, and apply usage limits to prevent overuse. Location-based protections can also be enabled for designated apps.
- Block specific apps
- Set app usage schedules
- Apply app usage limits
- Location-based app protection
- Manage children's device time
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XLocker is a highly useful screen time control app designed for parents. It offers flexible and effective features to help parents manage the time their children spend on devices. With XLocker, parents can: - Block specific apps such as social media and games to gain better control over their children's device usage. - Set up schedules based on daily needs like study time and leisure time, and authorize certain apps for certain time slots to avoid accidental overuse or excessive addiction. - Apply usage limits to each app, so that if a child exceeds the preset time limit, the app will be locked, thereby limiting excessive use of the device and the app. - Enable app protections based on geographic location; when the user enters a designated area, protections will be enabled for specified apps. In short, XLocker is a highly practical app that can help parents and individuals control screen time and promote work-life balance in a simple and user-friendly way. Privacy Policy and Terms of Use https://omiapps.com/privacy https://omiapps.com/terms
Screenshots
Verdict
The clearest difference is review sentiment: Periodic Table PRO at 50% against XLocker's 26%. Periodic Table PRO also leads on rating (4.6 vs 4.4) and iOS requirement (13.0 vs 16.0). XLocker's advantage is update cadence (every 9 days vs every 6 weeks) and ratings volume (1.3K vs 86). On price, ads, in-app purchases 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. Periodic Table PRO sells 8 one-off in-app purchases and XLocker sells 12 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Periodic Table PRO holds the better App Store score, 4.6 against 4.4. That said, the two scores are not equally well evidenced: XLocker has 1.3K ratings behind it against 86, so its average is the more settled of the two. Written reviews point the same way: 50% of Periodic Table PRO's written reviews are positive against 26% of XLocker's.
Periodic Table PRO ships an update every 6 weeks, XLocker every 9 days. The most recent releases landed on September 18, 2026 and September 24, 2026 respectively.
| Parameter | Periodic Table PRO | XLocker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (86 ratings) — better | 4.4 (1.3K ratings) |
| Positive reviews | 50.0% of reviews — better | 25.9% of reviews |
| Number of ratings | 86 | 1.3K — better |
| Update frequency | Every 6 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 210 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | AGILE FLEX TECH SRL | Nanjing Mairui Software Development Co., Ltd. |
Customer experience
Periodic Table PRO
XLocker
Bugs and requests
Periodic Table PRO
Not enough reviews yet to summarise bugs or requests.
XLocker
Reported bugs
3 issues- Occasional breaks where it gets stuck when typing password
- Unstable on iOS 16.5
- Search doesn't work well
Requested features
3 requests- Add Face ID
- 一键隐藏所有受保护的应用
- Advanced settings?
In-app purchases
Periodic Table PRO
- SPECIAL OFFER!$9.99
- Chernobyl experiments$9.99
- Explosive experiments$9.99
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- Funny experiments$9.99
- Experiments with fire$9.99
- Gas bubbles experiments$9.99
- Melting experiments$9.99
- Oxidation experiments$9.99
XLocker
- Upgrade to VIP$3.997 Days
- Upgrade to VIP$5.991 Month
- Upgrade to VIP$7.997 Days
Show 7 moreShow fewer
- Upgrade to VIP(3-day trial)7 Days trial$7.997 Days
- Upgrade to VIP$9.991 Year
- Upgrade to VIP3 Days trial$11.991 Month
- Upgrade to VIP(3-day trial)7 Days trial$15.997 Days
- Upgrade to VIP3 Days trial$19.991 Year
- Upgrade to VIP$19.991 Year
- Upgrade to VIP(3-day trial)3 Days trial$39.991 Year
- Upgrade to lifetime VIP$19.99
- Upgrade to lifetime VIP$39.99
Questions
Is Periodic Table PRO free?
Is XLocker free?
Which has better reviews, Periodic Table PRO or XLocker?
Do Periodic Table PRO or XLocker have ads?
Which is updated more often, Periodic Table PRO or XLocker?
Other comparisons
