SolWalks vs NaNEye
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SolWalks
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SolWalks is a tool that helps you develop a habit of taking outdoor walks at the time intervals most efficient to synchronize your circadian clock. In the early 2000s, a type of photosensitive cell called ipRGC was discovered in the human eye. These cells are involved in registering the ambient light illuminance on a subconscious level. It is proved that this signal is the main way to synchronize the body's circadian clock. Spending most of the day indoors and using artificial light frequently can lead to desynchronization of your circadian clock, impaired sleep, increased fatigue, and a depressed mood. SolWalks has a built-in light meter that will allow you to assess the ambient light illuminance, in a similar manner as it happens on a subconscious level. The app is integrated with HealthKit. It visualizes your HealthKit walks data, raising your awareness of the time you spent outside and motivating you to stick to the habit of walking at the optimal time of the day. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
NaNEye
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NaNEye is an app that works with the Apple Watch to leverage the data in Apple Health, giving you daily, personalized insights about your health and training.
Screenshots
Verdict
SolWalks and NaNEye are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
SolWalks ships an update every 2 weeks, NaNEye every 3 weeks. The most recent releases landed on December 20, 2025 and May 19, 2026 respectively.
| Parameter | SolWalks | NaNEye |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone |
| Requires iOS | 16.2 | 16.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 60 MB |
| Age rating | 4+ | 17+ |
| Developer | Evgeniy Basistyi | Aladdin Persson |
In-app purchases
SolWalks
No in-app purchases
NaNEye
No in-app purchases








