ZKT Timer vs Human Limit Test
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ZKT Timer
This app is a comprehensive speedcubing platform for enthusiasts. It offers training tools, detailed performance analysis, and features for participating in and tracking global competitions. Users can connect smart hardware, practice algorithms, and engage in multiplayer challenges.
- WCA competition hub with live tracking
- Smart cube and gyroscope integration
- Phase analysis for split times
- Algorithm trainer with visualization
- Multiplayer and 1v1 battle modes
- Customizable interface and themes
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ZKT Timer times your cube solves, keeps every result and shows you where the time goes. You can time with touch, StackMat, GAN Timer, QiYi Timer or a smart cube. Inspection, +2 and DNF follow WCA rules, and a new scramble comes up after every solve. Smart cubes GAN, MoYu, QiYi, Giiker and Particula smart cubes connect over Bluetooth. The cube turns on screen in 3D as you turn it. The time starts on your first move and stops when the cube is solved. With Pro you see the Cross, F2L, OLL and PLL times, move count and TPS for every solve, and you can replay it move by move. Your stats also show which OLL and PLL cases slow you down. Algorithm trainer More than 40 sets, including OLL, PLL, F2L, ZBLL, COLL, CMLL and sets for 2x2, 4x4, Pyraminx and Square-1. Each case shows its pattern. You can build your own sets and practice PLL recognition. With Pro you can drill algorithms on a smart cube and see whether each move is right, and download algorithms as a PDF. Online Battle and rooms Online Battle pairs you with someone searching at the same moment. You both solve the same scramble on a smart cube, and the first to win three rounds takes the match. Times come from the cube's own clock, so internet lag does not change the result. For now it is 3x3 only, with GAN, QiYi and MoYu WeiLong V10 AI cubes. In rooms you solve the same scramble as your friends and chat. Offline Battle puts two players face to face on one phone. Competitions Follow upcoming WCA and ZKT competitions, with groups, schedule and live results on one page. With Pro you can follow up to 5 competitors per competition and get notified about their results and about records broken in the events you pick. Stats and data PB, ao5, ao12 and solve count are open to everyone. Pro unlocks every stats module and chart, and lets you arrange them under the timer. You can import from csTimer and Twisty Timer and export all your solves. When you are signed in, your solves are backed up to the server, and the app keeps working offline. With Pro your solves sync across all your devices. Pro also adds Magnet Timer: lift a magnetic cube from beside the phone's rear camera and the time starts; put it down on the table and it stops. Drop to stop: when you finish, drop the cube or your hands on the table and the timer stops. 6 extra themes and your own background image. Music, smart cubes and GAN Timer in rooms. Publishing your best times to the leaderboard. Monthly, yearly and lifetime plans. The app is in English, Turkish, Spanish, Russian and Chinese. You can also use the same account in the browser at zktimer.app. Terms of Use (EULA): https://zktimer.app/terms Privacy Policy: https://zktimer.app/privacy
Human Limit Test
Test and train your brain daily with various modules designed to improve reaction speed, memory, and focus. Track your progress, compare scores with friends, and unlock your potential with quick, engaging exercises.
- 10 test modules
- Reaction time testing
- Memory training
- Focus and observation skills
- Hand-eye coordination
- Progress tracking
- Friend score comparison
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Human Limit Test is an app focused on human ability testing and daily brain training. It includes 10 test modules, such as Reaction Time, Sequence Memory, Aim Trainer, Number Memory, Verbal Memory, Order Memory, Visual Memory, Typing Test, Color Recognition, and Schulte Grid. These tests help you better understand your reaction speed, memory, focus, observation, and hand-eye coordination from different angles. Spending just a few minutes each day on these short tests can help your brain feel sharper and more active. It can help you stay focused, train visual search ability, improve reaction rhythm, and gradually build your own performance record. Every test result can be saved, reviewed through history trends, and used to track your progress. You can also compare scores with your friends and see who performs better! Inspired by Internet. P.S. I am still learning app development. If you have any suggestions, ideas, or just want to chat, feel free to contact me at liuyanguk23@outlook.com. I will try my best to reply to every message ^_^.
Screenshots
Verdict
The clearest difference is update cadence: ZKT Timer at fortnightly against Human Limit Test's every 5 months. ZKT Timer also leads on ratings volume (5 vs 1) and device support (3 vs 1). On price, rating, ads and in-app purchases 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. ZKT Timer sells 3 in-app purchases, starting at $2.99 per month and Human Limit Test sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for ZKT Timer against 5.0 for Human Limit Test. That said, the two scores are not equally well evidenced: ZKT Timer has 5 ratings behind it against 1, so its average is the more settled of the two.
ZKT Timer ships an update fortnightly, Human Limit Test every 5 months. Both last shipped on November 5, 2026.
| Parameter | ZKT Timer | Human Limit Test |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) | 5.0 (1 ratings) |
| Number of ratings | 5 — better | 1 |
| Update frequency | Fortnightly — better | Every 5 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 52 MB | 13 MB |
| Age rating | 4+ | 12+ |
| Developer | IBRAHIM YILDIZ | 洋 刘 |
Customer experience
ZKT Timer
Human Limit Test
In-app purchases
ZKT Timer
- ZKT Timer Pro$2.991 Month
- ZKT Timer Pro$19.991 Year
- ZKT Timer Pro Life Time$39.99
Human Limit Test
- Remove Ads$0.99









