Keepsmile vs STLight
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Keepsmile
Control a wide range of smart lighting products, including strip lights, bulbs, and lamps. Adjust colors, brightness, and settings for various lighting types like pool lamps and car lights.
- Control strip lights
- Manage LED bulbs
- Operate floor lamps
- Adjust wake lights
- Control star lights
- Manage car lights
- Operate pool lamps
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Keepsmile app makes it easy to take full advantage of Keepsmile products: Strip lights,Led bulb,Floor lamp,Wake light, Stars Light, Car light,Ceiling light(RGBCW),Flood light,Magic Ball light,Ceiling light(CCT),Ceiling light(RGB+CW),Pool lamp
STLight
Transform your bedroom into a comfortable and quiet starry night sky. This conceptual light projects a magical, serene environment, creating a wonderfully romantic atmosphere.
- Starry night sky projection
- Creates a comfortable and quiet environment
- Transforms bedrooms
- Romantic atmosphere creation
- Conceptual lighting
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星空灯是一款概念灯，放出的光射到墙壁和天花板上变成布满星星的夜空.能让睡房里变成非常舒服安静的繁星夜空，营造出奇妙的，安静的环境，可以为你营造出非常浪漫的环境
Screenshots
Verdict
The clearest difference is rating: STLight at 5.0 against Keepsmile's 2.5. STLight also leads on ads (none vs shown) and monetization model (free vs ad-supported). Keepsmile's advantage is update cadence (every 3 weeks vs every 5 months) and ratings volume (4.9K vs 1). On price, 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. Neither carries in-app purchases, so what you see is what you pay.
STLight holds the better App Store score, 5.0 against 2.5. That said, the two scores are not equally well evidenced: Keepsmile has 4.9K ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 20% of Keepsmile's written reviews are positive against 0% of STLight's, so the app with the better star average is not the one people write more warmly about.
Keepsmile ships an update every 3 weeks, STLight every 5 months. The most recent releases landed on November 15, 2026 and November 11, 2026 respectively.
| Parameter | Keepsmile | STLight |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (4.9K ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 20.2% of reviews — better | 0.0% of reviews |
| Number of ratings | 4.9K — better | 1 |
| Update frequency | Every 3 weeks — better | Every 5 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 122 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | 深圳市优智达科技有限公司 | Zhongshan Yong Qi Electronic Co.,LTD. |
Customer experience
Keepsmile
STLight
Bugs and requests
Keepsmile
Reported bugs
4 issues- Lights randomly change color
- App crashes or freezes
- Bluetooth connection issues
- Inability to log in or register
Requested features
4 requests- More customization options
- Ability to create custom light patterns
- Integration with smart home platforms
- Option to disable ads
STLight
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Keepsmile
No in-app purchases
STLight
No in-app purchases
Questions
Is Keepsmile free?
Is STLight free?
Which has better reviews, Keepsmile or STLight?
Do Keepsmile or STLight have ads?
Which is updated more often, Keepsmile or STLight?
Other comparisons
