KOWOLL 28E vs 4SISON
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KOWOLL 28E
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M28E robotic lawnmower is a planned borderless intelligent lawn mower robot, which is applied to the automatic lawn maintenance of the manor yard with a lawn area of 5000 square meters or less. M28E intelligent lawn mower by GNSS difference technology realize cm-level outdoor precise positioning, GNSS/INS data fusion technology for lawn mower attitude information, through the collision sensors to realize intelligent perception of the working environment, have a certain environmental self-learning and adaptive ability, truly autonomous navigation intelligent mowing the lawn, the efficiency of 300m²/h
4SISON
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Libera il tuo ingegno ed installa in autonomia e con semplici passaggi il tuo robot tosaerba 4SISON. E' sempice e conveniente.
Screenshots
Verdict
The clearest difference is iOS requirement: KOWOLL 28E at 10.0 against 4SISON's 12.0. On price, update cadence, ads and in-app purchases 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.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 19, 2026 and September 12, 2026 respectively.
| Parameter | KOWOLL 28E | 4SISON |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 10.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 45 MB | 62 MB |
| Age rating | 4+ | 17+ |
| Developer | Kalman Navigation | SABRE ITALIA SRL |
In-app purchases
KOWOLL 28E
No in-app purchases
4SISON
No in-app purchases
