NBack for iPad Lite vs TestSTMemory
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NBack for iPad Lite
This application helps improve mental acuity by training working memory through a sequence-matching game. Users are presented with stimuli and must recall the item from a specified number of steps prior in the sequence. It offers a simplified version of a more comprehensive training tool.
- Working memory training
- Sequence matching game
- Adjustable difficulty (1-2 back)
- Improves mental ability
- Lite version of full app
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Stimulus => Sensory Memory => Working Memory => Long-Term Memory If you want to sharpen your mental ability, you should train your working memory. Train your working memory with 'NBack'. *NBack:The current answer matches the one from N steps earlier in the sequence. 'NBack for iPad Lite' is Lite Version of 'NBack for iPad'. Full Version: 1'Back --- 10'Back Lite Version: 1'Back --- 2'Back
TestSTMemory
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* The app allows you to assess the level of short-term visual memory. The algorithm of the program was as follows: the test participant had to complete five stages, each consisting of ten attempts. At the first stage, during the first five attempts, the participant had to react to a single monochrome signal, memorize its location, and click on the corresponding circle. In the next five attempts, they had to respond to a colored signal. At each subsequent stage, the number of simultaneously appearing signals increased by one. By the fifth stage, the participant needed to memorize the locations of five signals and click on the corresponding circles. During the test, participants had to respond quickly and accurately to visual stimuli. The app's display showed the number of taps already made and how many remained (for stages 3, 4, and 5). To objectively assess short-term visual memory, the percentage of errors made during the test was calculated. A mistake was defined as clicking on a circle that did not correspond to the correct one. At the end of the test, the program prompted the user to enter information about the test participant and displayed indicators characterizing the measured quality." * Model characteristics could be generated based on the measurement results. To do this, the user needed to navigate to the 'Data' section, click 'Choose', select the desired measurements, and then click 'Model'. On the next screen, the main characteristics of the selected measurements were displayed. If the characteristics were satisfactory, the user could click 'Create model'. Created models were accessible in the settings under 'Models based on measurements'. To compare measurement results with a model, the user had to go to the 'Data' section, select a measurement, click 'Summary', and on the next screen, select 'Assessment'. As an example, the model characteristics of martial artists with high sports qualifications ('The model of qualified martial artists') were set by default." * Additionally, in the settings, users could save a backup of their measurements in JSON format ('Save backup'), import measurements from another device ('Add backup'), replace existing measurements with new ones ('Replace backup'), or delete all data ('Delete all data'). * The “Short-Term Visual Memory” app includes a machine learning model (Core ML) that automatically determines the level of short-term visual memory efficiency based on the results of a 5-stage test. The model analyses accuracy and attempt duration at stages 3, 4, and 5, because these stages involve higher cognitive load and better differentiate athletes by their ability to retain and reproduce visual stimuli. The model was developed using test results from combat sports athletes (n = 338) obtained under the following standardised task settings: number of cells — 77; visual stimulus duration — 300 ms. The result is presented as a short-term visual memory efficiency level (High / Medium / Low) and an integral STM Efficiency Index. This allows the app to be used for regular monitoring of athletes’ cognitive and psychophysiological functions, tracking individual changes over time, and selecting training tasks according to the athlete’s current condition. All calculations are performed locally on the device, without transmitting personal data to a server. Test results should be interpreted considering the athlete’s level of preparedness, testing conditions, and repeated-measurement dynamics. * The app is not a medical device and is not intended to provide medical diagnoses.
Verdict
The clearest difference is price: NBack for iPad Lite at Free against TestSTMemory's $2.99. TestSTMemory's advantage is ads (none vs shown) and iOS requirement (14.0 vs 18.2). On update cadence, 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
NBack for iPad Lite is free to download; TestSTMemory costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
NBack for iPad Lite ships an update every 12 months, TestSTMemory every 13 months. Both last shipped on October 6, 2026.
| Parameter | NBack for iPad Lite | TestSTMemory |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 4.3 (3 ratings) — better | — |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 12 months — better | Every 13 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPad | iPad |
| Requires iOS | 18.2 | 14.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Yasuyoshi Ota | Viacheslav Romanenko |
In-app purchases
NBack for iPad Lite
No in-app purchases
TestSTMemory
No in-app purchases
Questions
Is NBack for iPad Lite free?
Is TestSTMemory free?
Do NBack for iPad Lite or TestSTMemory have ads?
Which is updated more often, NBack for iPad Lite or TestSTMemory?
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