Comparison

CDOUBLES vs Vision Hero

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CDOUBLES

Features
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CDOUBLES is compatible with iOS 7.0 and above. It can support live view, remote playback, PTZ control, local playback, snapshot and push notifications etc. from DVR and NVR via 3G or WIFI.

About

Vision Hero

Features
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**Vision Trainer** - Visual Training Games ** Fun Visual Training Games** Vision Trainer combines engaging games with training elements to provide a relaxed visual training experience. Develop your visual abilities through fun, carefully-designed games suitable for all ages. ** Core Features** • **Single Eye Training Mode** - Supports independent left and right eye training, can be used with eye patch • **6 Diverse Training Games** - Carefully designed visual training activities • **Smart Difficulty Adjustment** - Three-level difficulty system adapting to different training stages • **Progress Tracking System** - Detailed records of training time, accuracy, and progress • **Character Growth System** - Adorable Vision Sprite companion motivating continued training ** Training Games** 1. **Rainbow Maker** - RGB color mixing training to enhance color recognition 2. **Bubble Adventure** - Reaction speed and color identification dual training 3. **Happy Fishing** - Dynamic visual tracking and color differentiation training 4. **Block Puzzle** - Spatial cognition and visual memory strengthening 5. **Memory Cards** - Visual memory and focus enhancement 6. **Spot the Difference** - Visual discrimination and detail observation training ** Training Features** • Designed following visual training principles • Supports single-eye occlusion training mode • Adjustable training duration and difficulty • Detailed training data reports ** Parent-Friendly** • Comprehensive learning statistics reports • Safe privacy protection design • Ad-free, distraction-free environment • Supports Traditional Chinese and English interfaces **Usage Instructions** This application is a visual training game tool that can be adjusted according to individual needs. Regular tracking of training progress helps understand training effectiveness. Download now and regain clear vision through play!

Screenshots

CDOUBLES4 screens
Vision Hero4 screens

Verdict

The call

The clearest difference is update cadence: Vision Hero at every 3 days against CDOUBLES's every 4 months. CDOUBLES's advantage is iOS requirement (7.0 vs 14.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

CDOUBLES ships an update every 4 months, Vision Hero every 3 days. The most recent releases landed on September 6, 2026 and February 23, 2026 respectively.

Scorecard2 real differences · 4 level
CDOUBLES versus Vision Hero: the parameters behind the verdict, then further details
ParameterCDOUBLESVision Hero
PriceFreeFree
Update frequencyEvery 4 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS7.0 — better14.0
Further details — not scored
Size32 MB14 MB
Age rating4+4+
DeveloperCHUNG YI HUNGZhegang Xu

In-app purchases

None

CDOUBLES

No in-app purchases

None

Vision Hero

No in-app purchases

Questions

Is CDOUBLES free?
CDOUBLES is free to download, with no in-app purchases.
Is Vision Hero free?
Vision Hero is free to download, with no in-app purchases.
Do CDOUBLES or Vision Hero have ads?
Neither CDOUBLES nor Vision Hero shows ads.
Which is updated more often, CDOUBLES or Vision Hero?
CDOUBLES ships an update every 4 months, and Vision Hero every 3 days. Most recently, CDOUBLES was updated on September 6, 2026 and Vision Hero on February 23, 2026.

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