CHAEVI vs VIVA Studio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CHAEVI
This app simplifies electric vehicle charging by allowing users to find, reserve, and pay for charging stations. It provides real-time charging status and eliminates the need for multiple physical charging cards.
- Find charging stations
- Reserve charging spots
- Pay for charging
- Real-time charging status
- Eliminates multiple charging cards
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Charge up like a superhero with the Chaevi Mobile App - the ultimate tool for hassle-free charging! Tired of carrying multiple pocket cards? Say goodbye to the inconvenience with Chaevi Mobile App - the perfect sidekick for EV drivers! Join the Chaevi-vengers and become a charging hero! Our mobile app makes finding, reserving, and paying for charging stations a breeze! No more waiting and wondering where to charge! The Chaevi Mobile App puts real-time charging status and payment in one convenient place! Don't let charging be a hassle - power up your EV with the Chaevi Mobile App! It's the perfect charging companion for all EV drivers!
VIVA Studio
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VIVA Studio lets you design and send screens to compatible VIVA e-paper tags. • Choose designs that match your tag’s screen size and colors • Start with designs for price labels, name badges, meeting room signs, and desk nameplates • Edit the position, size, and color of text, shapes, and images • Use multiple fonts and rotate images • Continue editing your saved designs • Connect by NFC or device search, then send your design over Bluetooth • Refresh the connected display or show its initial screen • Use the app in Korean, English, Japanese, or Spanish Designs are saved on your device, and you can use the editor without creating an account. Sending designs and refreshing displays requires a compatible VIVA tag and a Bluetooth-enabled device. NFC is required only for NFC connection. Available screen sizes and colors depend on the connected tag model.
Screenshots
Verdict
The clearest difference is ads: VIVA Studio at none against CHAEVI's shown. VIVA Studio also leads on update cadence (daily vs every 2 weeks) and device support (4 vs 2). On price, in-app purchases and iOS requirement 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.
CHAEVI ships an update every 2 weeks, VIVA Studio daily. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | CHAEVI | VIVA Studio |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (7 ratings) — better | — |
| Positive reviews | 25.0% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 2 weeks | Daily — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 254 MB |
| Age rating | 4+ | 4+ |
| Developer | Chaevi. co., Ltd | 4SEILS |
In-app purchases
CHAEVI
No in-app purchases
VIVA Studio
No in-app purchases









